68631554 has 4 divisors (see below), whose sum is σ = 102947334. Its totient is φ = 34315776.

The previous prime is 68631539. The next prime is 68631571. The reversal of 68631554 is 45513686.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 38105929 + 30525625 = 6173^2 + 5525^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17157887 + ... + 17157890.

Almost surely, 2^68631554 is an apocalyptic number.

68631554 is a deficient number, since it is larger than the sum of its proper divisors (34315780).

68631554 is a wasteful number, since it uses less digits than its factorization.

68631554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34315779.

The product of its digits is 86400, while the sum is 38.

The square root of 68631554 is about 8284.4163342990. The cubic root of 68631554 is about 409.4252386648.

The spelling of 68631554 in words is "sixty-eight million, six hundred thirty-one thousand, five hundred fifty-four".