531565640165136 has 80 divisors (see below), whose sum is σ = 1373683751362944. Its totient is φ = 177127583373312.

The previous prime is 531565640165113. The next prime is 531565640165141. The reversal of 531565640165136 is 631561046565135.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3068875045 + ... + 3069048251.

Almost surely, 2^{531565640165136} is an apocalyptic number.

It is an amenable number.

531565640165136 is an abundant number, since it is smaller than the sum of its proper divisors (842118111197808).

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

531565640165136 is a wasteful number, since it uses less digits than its factorization.

531565640165136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194848 (or 194842 counting only the distinct ones).

The product of its (nonzero) digits is 29160000, while the sum is 57.

The spelling of 531565640165136 in words is "five hundred thirty-one trillion, five hundred sixty-five billion, six hundred forty million, one hundred sixty-five thousand, one hundred thirty-six".