642506651512 has 16 divisors (see below), whose sum is σ = 1314218151000. Its totient is φ = 292048477920.

The previous prime is 642506651503. The next prime is 642506651519. The reversal of 642506651512 is 215156605246.

642506651512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×642506651512² (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 (642506651519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3650605887 + ... + 3650606062.

Almost surely, 2^642506651512 is an apocalyptic number.

It is an amenable number.

642506651512 is an abundant number, since it is smaller than the sum of its proper divisors (671711499488).

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

642506651512 is a wasteful number, since it uses less digits than its factorization.

642506651512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7301211966 (or 7301211962 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 642506651512 in words is "six hundred forty-two billion, five hundred six million, six hundred fifty-one thousand, five hundred twelve".