1231565056970 has 16 divisors (see below), whose sum is σ = 2216836837728. Its totient is φ = 492621637200.

The previous prime is 1231565056919. The next prime is 1231565056993. The reversal of 1231565056970 is 796505651321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 785837 + ... + 1755183.

It is an arithmetic number, because the mean of its divisors is an integer number (138552302358).

Almost surely, 2^{1231565056970} is an apocalyptic number.

1231565056970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231565056970 is a deficient number, since it is larger than the sum of its proper divisors (985271780758).

1231565056970 is a wasteful number, since it uses less digits than its factorization.

1231565056970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096405.

The product of its (nonzero) digits is 1701000, while the sum is 50.

The spelling of 1231565056970 in words is "one trillion, two hundred thirty-one billion, five hundred sixty-five million, fifty-six thousand, nine hundred seventy".