68557902 has 32 divisors (see below), whose sum is σ = 157949952. Its totient is φ = 19432224.

The previous prime is 68557901. The next prime is 68557919. The reversal of 68557902 is 20975586.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68557901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1093 + ... + 11760.

It is an arithmetic number, because the mean of its divisors is an integer number (4935936).

Almost surely, 2^68557902 is an apocalyptic number.

68557902 is an abundant number, since it is smaller than the sum of its proper divisors (89392050).

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

68557902 is a wasteful number, since it uses less digits than its factorization.

68557902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12992.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 68557902 is about 8279.9699274816. The cubic root of 68557902 is about 409.2787279162.

The spelling of 68557902 in words is "sixty-eight million, five hundred fifty-seven thousand, nine hundred two".