231720576772 has 6 divisors (see below), whose sum is σ = 405511009358. Its totient is φ = 115860288384.

The previous prime is 231720576743. The next prime is 231720576781. The reversal of 231720576772 is 277675027132.

It can be written as a sum of positive squares in only one way, i.e., 231078258436 + 642318336 = 480706^2 + 25344^2 .

It is a super-3 number, since 3×231720576772³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28965072093 + ... + 28965072100.

Almost surely, 2^231720576772 is an apocalyptic number.

It is an amenable number.

231720576772 is a deficient number, since it is larger than the sum of its proper divisors (173790432586).

231720576772 is a wasteful number, since it uses less digits than its factorization.

231720576772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57930144197 (or 57930144195 counting only the distinct ones).

The product of its (nonzero) digits is 1728720, while the sum is 49.

The spelling of 231720576772 in words is "two hundred thirty-one billion, seven hundred twenty million, five hundred seventy-six thousand, seven hundred seventy-two".