68536638051 has 12 divisors (see below), whose sum is σ = 106301724552. Its totient is φ = 39163793088.

The previous prime is 68536638043. The next prime is 68536638089. The reversal of 68536638051 is 15083663586.

It is not a de Polignac number, because 68536638051 - 2³ = 68536638043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68536637985 and 68536638003.

It is not an unprimeable number, because it can be changed into a prime (68536634051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 233117670 + ... + 233117963.

It is an arithmetic number, because the mean of its divisors is an integer number (8858477046).

Almost surely, 2^68536638051 is an apocalyptic number.

68536638051 is a deficient number, since it is larger than the sum of its proper divisors (37765086501).

68536638051 is a wasteful number, since it uses less digits than its factorization.

68536638051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466235650 (or 466235643 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 51.

The spelling of 68536638051 in words is "sixty-eight billion, five hundred thirty-six million, six hundred thirty-eight thousand, fifty-one".