642610106636 has 24 divisors (see below), whose sum is σ = 1190794194576. Its totient is φ = 302385589760.

The previous prime is 642610106581. The next prime is 642610106641. The reversal of 642610106636 is 636601016246.

It is a junction number, because it is equal to n+sod(n) for n = 642610106593 and 642610106602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 811391 + ... + 1394121.

It is an arithmetic number, because the mean of its divisors is an integer number (49616424774).

Almost surely, 2^642610106636 is an apocalyptic number.

It is an amenable number.

642610106636 is a deficient number, since it is larger than the sum of its proper divisors (548184087940).

642610106636 is a wasteful number, since it uses less digits than its factorization.

642610106636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598969 (or 598967 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 41.

The spelling of 642610106636 in words is "six hundred forty-two billion, six hundred ten million, one hundred six thousand, six hundred thirty-six".