68918554 has 4 divisors (see below), whose sum is σ = 103377834. Its totient is φ = 34459276.

The previous prime is 68918543. The next prime is 68918569. The reversal of 68918554 is 45581986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45581986 = 2 ⋅22790993.

It can be written as a sum of positive squares in only one way, i.e., 51051025 + 17867529 = 7145^2 + 4227^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17229637 + ... + 17229640.

Almost surely, 2^68918554 is an apocalyptic number.

68918554 is a deficient number, since it is larger than the sum of its proper divisors (34459280).

68918554 is a wasteful number, since it uses less digits than its factorization.

68918554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34459279.

The product of its digits is 345600, while the sum is 46.

The square root of 68918554 is about 8301.7199422770. The cubic root of 68918554 is about 409.9951496551.

The spelling of 68918554 in words is "sixty-eight million, nine hundred eighteen thousand, five hundred fifty-four".