52231640661 has 24 divisors (see below), whose sum is σ = 79987908000. Its totient is φ = 32751063072.

The previous prime is 52231640627. The next prime is 52231640689. The reversal of 52231640661 is 16604613225.

52231640661 is a `hidden beast` number, since 5 + 2 + 2 + 3 + 1 + 640 + 6 + 6 + 1 = 666.

It is not a de Polignac number, because 52231640661 - 2⁶ = 52231640597 is a prime.

It is a super-2 number, since 2×52231640661² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52231640611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1074966 + ... + 1122503.

It is an arithmetic number, because the mean of its divisors is an integer number (3332829500).

Almost surely, 2^52231640661 is an apocalyptic number.

It is an amenable number.

52231640661 is a deficient number, since it is larger than the sum of its proper divisors (27756267339).

52231640661 is a wasteful number, since it uses less digits than its factorization.

52231640661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197633 (or 2197630 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 52231640661 in words is "fifty-two billion, two hundred thirty-one million, six hundred forty thousand, six hundred sixty-one".