1651155660 has 144 divisors (see below), whose sum is σ = 6244422912. Its totient is φ = 343094400.

The previous prime is 1651155659. The next prime is 1651155691. The reversal of 1651155660 is 665511561.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45706 + ... + 73425.

It is an arithmetic number, because the mean of its divisors is an integer number (43364048).

Almost surely, 2^1651155660 is an apocalyptic number.

1651155660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1651155660 is an abundant number, since it is smaller than the sum of its proper divisors (4593267252).

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

1651155660 is a wasteful number, since it uses less digits than its factorization.

1651155660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119164 (or 119159 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1651155660 is about 40634.4147244672. The cubic root of 1651155660 is about 1181.9415656477.

The spelling of 1651155660 in words is "one billion, six hundred fifty-one million, one hundred fifty-five thousand, six hundred sixty".