1651445460 has 144 divisors (see below), whose sum is σ = 5740180992. Its totient is φ = 376473600.

The previous prime is 1651445449. The next prime is 1651445461. The reversal of 1651445460 is 645441561.

1651445460 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1651445460² = 5454544214709223200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1651445461) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 541540 + ... + 544580.

It is an arithmetic number, because the mean of its divisors is an integer number (39862368).

Almost surely, 2^1651445460 is an apocalyptic number.

1651445460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1651445460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2870090496).

1651445460 is an abundant number, since it is smaller than the sum of its proper divisors (4088735532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1651445460 is a wasteful number, since it uses less digits than its factorization.

1651445460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3494 (or 3489 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 1651445460 is about 40637.9805108472. The cubic root of 1651445460 is about 1182.0107104770.

The spelling of 1651445460 in words is "one billion, six hundred fifty-one million, four hundred forty-five thousand, four hundred sixty".