231686944890 has 64 divisors (see below), whose sum is σ = 580288133376. Its totient is φ = 59090499072.

The previous prime is 231686944883. The next prime is 231686944921. The reversal of 231686944890 is 98449686132.

It is a super-2 number, since 2×231686944890² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11922462 + ... + 11941878.

It is an arithmetic number, because the mean of its divisors is an integer number (9067002084).

Almost surely, 2^231686944890 is an apocalyptic number.

231686944890 is an abundant number, since it is smaller than the sum of its proper divisors (348601188486).

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

231686944890 is a wasteful number, since it uses less digits than its factorization.

231686944890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36743.

The product of its (nonzero) digits is 17915904, while the sum is 60.

The spelling of 231686944890 in words is "two hundred thirty-one billion, six hundred eighty-six million, nine hundred forty-four thousand, eight hundred ninety".