68187220387 has 36 divisors (see below), whose sum is σ = 85187393760. Its totient is φ = 54208012320.

The previous prime is 68187220379. The next prime is 68187220391. The reversal of 68187220387 is 78302278186.

68187220387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 68187220387 - 2³ = 68187220379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68187221387) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 507814 + ... + 627892.

Almost surely, 2^68187220387 is an apocalyptic number.

68187220387 is a deficient number, since it is larger than the sum of its proper divisors (17000173373).

68187220387 is a wasteful number, since it uses less digits than its factorization.

68187220387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120152 (or 120122 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 52.

The spelling of 68187220387 in words is "sixty-eight billion, one hundred eighty-seven million, two hundred twenty thousand, three hundred eighty-seven".