642624262026 has 64 divisors (see below), whose sum is σ = 1398199968000. Its totient is φ = 196078924800.

The previous prime is 642624261973. The next prime is 642624262037. The reversal of 642624262026 is 620262426246.

642624262026 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 2×642624262026² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9594100 + ... + 9660848.

It is an arithmetic number, because the mean of its divisors is an integer number (21846874500).

Almost surely, 2^642624262026 is an apocalyptic number.

642624262026 is an abundant number, since it is smaller than the sum of its proper divisors (755575705974).

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

642624262026 is a wasteful number, since it uses less digits than its factorization.

642624262026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69359.

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 642624262026 in words is "six hundred forty-two billion, six hundred twenty-four million, two hundred sixty-two thousand, twenty-six".