156661606660992 has 64 divisors (see below), whose sum is σ = 420021480585600. Its totient is φ = 51732493151744.

The previous prime is 156661606660991. The next prime is 156661606661089. The reversal of 156661606660992 is 299066606166651.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-3 number, since 3×156661606660992³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156661606660991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1906374492 + ... + 1906456667.

It is an arithmetic number, because the mean of its divisors is an integer number (6562835634150).

Almost surely, 2^{156661606660992} is an apocalyptic number.

156661606660992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

156661606660992 is an abundant number, since it is smaller than the sum of its proper divisors (263359873924608).

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

156661606660992 is a wasteful number, since it uses less digits than its factorization.

156661606660992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3812831283 (or 3812831271 counting only the distinct ones).

The product of its (nonzero) digits is 226748160, while the sum is 69.

The spelling of 156661606660992 in words is "one hundred fifty-six trillion, six hundred sixty-one billion, six hundred six million, six hundred sixty thousand, nine hundred ninety-two".