642955520632 has 16 divisors (see below), whose sum is σ = 1216210112640. Its totient is φ = 318632823936.

The previous prime is 642955520591. The next prime is 642955520633. The reversal of 642955520632 is 236025559246.

It is a super-2 number, since 2×642955520632² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642955520633) 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 3 ways as a sum of consecutive naturals, for example, 355616088 + ... + 355617895.

It is an arithmetic number, because the mean of its divisors is an integer number (76013132040).

Almost surely, 2^642955520632 is an apocalyptic number.

It is an amenable number.

642955520632 is a deficient number, since it is larger than the sum of its proper divisors (573254592008).

642955520632 is a wasteful number, since it uses less digits than its factorization.

642955520632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711234102 (or 711234098 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 49.

The spelling of 642955520632 in words is "six hundred forty-two billion, nine hundred fifty-five million, five hundred twenty thousand, six hundred thirty-two".