161610625008 has 160 divisors (see below), whose sum is σ = 547253227520. Its totient is φ = 44684939520.

The previous prime is 161610625003. The next prime is 161610625021. The reversal of 161610625008 is 800526016161.

161610625008 is a `hidden beast` number, since 1 + 6 + 16 + 10 + 625 + 0 + 0 + 8 = 666.

It is a super-2 number, since 2×161610625008² (a number of 23 digits) 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 (161610625003) 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, 768235 + ... + 955722.

It is an arithmetic number, because the mean of its divisors is an integer number (3420332672).

Almost surely, 2^161610625008 is an apocalyptic number.

161610625008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

161610625008 is an abundant number, since it is smaller than the sum of its proper divisors (385642602512).

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

161610625008 is a wasteful number, since it uses less digits than its factorization.

161610625008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724012 (or 1724000 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 161610625008 in words is "one hundred sixty-one billion, six hundred ten million, six hundred twenty-five thousand, eight".