1610656656 has 80 divisors (see below), whose sum is σ = 4852368000. Its totient is φ = 460182912.

The previous prime is 1610656651. The next prime is 1610656667. The reversal of 1610656656 is 6566560161.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1610656651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32451 + ... + 65378.

It is an arithmetic number, because the mean of its divisors is an integer number (60654600).

Almost surely, 2^1610656656 is an apocalyptic number.

1610656656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1610656656 is an abundant number, since it is smaller than the sum of its proper divisors (3241711344).

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

1610656656 is an equidigital number, since it uses as much as digits as its factorization.

1610656656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97861 (or 97841 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 1610656656 is about 40132.9871302897. The cubic root of 1610656656 is about 1172.1980391192.

The spelling of 1610656656 in words is "one billion, six hundred ten million, six hundred fifty-six thousand, six hundred fifty-six".