68687221954 has 12 divisors (see below), whose sum is σ = 111565932066. Its totient is φ = 31701794592.

The previous prime is 68687221949. The next prime is 68687221961. The reversal of 68687221954 is 45912278686.

It can be written as a sum of positive squares in 3 ways, for example, as 19578445929 + 49108776025 = 139923^2 + 221605^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101607979 + ... + 101608654.

Almost surely, 2^68687221954 is an apocalyptic number.

68687221954 is a deficient number, since it is larger than the sum of its proper divisors (42878710112).

68687221954 is a wasteful number, since it uses less digits than its factorization.

68687221954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203216661 (or 203216648 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 58.

The spelling of 68687221954 in words is "sixty-eight billion, six hundred eighty-seven million, two hundred twenty-one thousand, nine hundred fifty-four".