68291254638 has 48 divisors (see below), whose sum is σ = 152768678400. Its totient is φ = 22024930320.

The previous prime is 68291254547. The next prime is 68291254709. The reversal of 68291254638 is 83645219286.

68291254638 is a `hidden beast` number, since 6 + 8 + 2 + 91 + 2 + 546 + 3 + 8 = 666.

It is a super-2 number, since 2×68291254638² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3706533 + ... + 3724911.

It is an arithmetic number, because the mean of its divisors is an integer number (3182680800).

Almost surely, 2^68291254638 is an apocalyptic number.

68291254638 is an abundant number, since it is smaller than the sum of its proper divisors (84477423762).

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

68291254638 is a wasteful number, since it uses less digits than its factorization.

68291254638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25077 (or 25074 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The spelling of 68291254638 in words is "sixty-eight billion, two hundred ninety-one million, two hundred fifty-four thousand, six hundred thirty-eight".