642136351088 has 20 divisors (see below), whose sum is σ = 1255149265008. Its totient is φ = 318226863360.

The previous prime is 642136351079. The next prime is 642136351091. The reversal of 642136351088 is 880153631246.

It is a super-3 number, since 3×642136351088³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177580148 + ... + 177583763.

Almost surely, 2^642136351088 is an apocalyptic number.

It is an amenable number.

642136351088 is a deficient number, since it is larger than the sum of its proper divisors (613012913920).

642136351088 is a wasteful number, since it uses less digits than its factorization.

642136351088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355164032 (or 355164026 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 642136351088 in words is "six hundred forty-two billion, one hundred thirty-six million, three hundred fifty-one thousand, eighty-eight".