1651606044 has 96 divisors (see below), whose sum is σ = 4291854336. Its totient is φ = 490150080.

The previous prime is 1651606043. The next prime is 1651606067. The reversal of 1651606044 is 4406061561.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 1651605996 and 1651606014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1651606043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1390819 + ... + 1392005.

It is an arithmetic number, because the mean of its divisors is an integer number (44706816).

Almost surely, 2^1651606044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1651606044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2145927168).

1651606044 is an abundant number, since it is smaller than the sum of its proper divisors (2640248292).

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

1651606044 is a wasteful number, since it uses less digits than its factorization.

1651606044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415 (or 1413 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1651606044 is about 40639.9562499765. The cubic root of 1651606044 is about 1182.0490215324.

The spelling of 1651606044 in words is "one billion, six hundred fifty-one million, six hundred six thousand, forty-four".