156980640069 has 48 divisors (see below), whose sum is σ = 261373432320. Its totient is φ = 89789433120.

The previous prime is 156980640067. The next prime is 156980640073. The reversal of 156980640069 is 960046089651.

It is a happy number.

156980640069 is a `hidden beast` number, since 156 + 9 + 80 + 6 + 400 + 6 + 9 = 666.

It is not a de Polignac number, because 156980640069 - 2¹ = 156980640067 is a prime.

It is a super-2 number, since 2×156980640069² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 156980639997 and 156980640024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156980640067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 336042 + ... + 653364.

It is an arithmetic number, because the mean of its divisors is an integer number (5445279840).

Almost surely, 2^156980640069 is an apocalyptic number.

156980640069 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

156980640069 is a deficient number, since it is larger than the sum of its proper divisors (104392792251).

156980640069 is a wasteful number, since it uses less digits than its factorization.

156980640069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317622 (or 317619 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 156980640069 in words is "one hundred fifty-six billion, nine hundred eighty million, six hundred forty thousand, sixty-nine".