156997786680000 has 1400 divisors, whose sum is σ = 678776690330112. Its totient is φ = 35121454848000.

The previous prime is 156997786679959. The next prime is 156997786680019. The reversal of 156997786680000 is 86687799651.

It is a tau number, because it is divible by the number of its divisors (1400).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 199 ways as a sum of consecutive naturals, for example, 1065886359 + ... + 1066033641.

Almost surely, 2^{156997786680000} is an apocalyptic number.

156997786680000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156997786680000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339388345165056).

156997786680000 is an abundant number, since it is smaller than the sum of its proper divisors (521778903650112).

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

156997786680000 is an equidigital number, since it uses as much as digits as its factorization.

156997786680000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147381 (or 147347 counting only the distinct ones).

The product of its (nonzero) digits is 274337280, while the sum is 72.

The spelling of 156997786680000 in words is "one hundred fifty-six trillion, nine hundred ninety-seven billion, seven hundred eighty-six million, six hundred eighty thousand".