231880787636 has 12 divisors (see below), whose sum is σ = 405821582628. Its totient is φ = 115931764032.

The previous prime is 231880787603. The next prime is 231880787657. The reversal of 231880787636 is 636787088132.

It can be written as a sum of positive squares in 2 ways, for example, as 144711768100 + 87169019536 = 380410^2 + 295244^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2096801 + ... + 2204616.

It is an arithmetic number, because the mean of its divisors is an integer number (33818465219).

Almost surely, 2^231880787636 is an apocalyptic number.

It is an amenable number.

231880787636 is a deficient number, since it is larger than the sum of its proper divisors (173940794992).

231880787636 is a wasteful number, since it uses less digits than its factorization.

231880787636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4314898 (or 4314896 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 59.

The spelling of 231880787636 in words is "two hundred thirty-one billion, eight hundred eighty million, seven hundred eighty-seven thousand, six hundred thirty-six".