156997786680001 has 24 divisors (see below), whose sum is σ = 174109917267000. Its totient is φ = 141358484219904.

The previous prime is 156997786679959. The next prime is 156997786680019. The reversal of 156997786680001 is 100086687799651.

156997786680001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 10343845954225 + 146653940725776 = 3216185^2 + 12110076^2 .

It is not a de Polignac number, because 156997786680001 - 2⁷ = 156997786679873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 156997786679897 and 156997786679906.

It is not an unprimeable number, because it can be changed into a prime (156997786680071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85015756 + ... + 86842813.

It is an arithmetic number, because the mean of its divisors is an integer number (7254579886125).

Almost surely, 2^{156997786680001} is an apocalyptic number.

It is an amenable number.

156997786680001 is a deficient number, since it is larger than the sum of its proper divisors (17112130586999).

156997786680001 is a wasteful number, since it uses less digits than its factorization.

156997786680001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171858741 (or 171858724 counting only the distinct ones).

The product of its (nonzero) digits is 274337280, while the sum is 73.

The spelling of 156997786680001 in words is "one hundred fifty-six trillion, nine hundred ninety-seven billion, seven hundred eighty-six million, six hundred eighty thousand, one".