55891716938 has 4 divisors (see below), whose sum is σ = 83837575410. Its totient is φ = 27945858468.

The previous prime is 55891716931. The next prime is 55891716943. The reversal of 55891716938 is 83961719855.

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., 32100813889 + 23790903049 = 179167^2 + 154243^2 .

It is not an unprimeable number, because it can be changed into a prime (55891716931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13972929233 + ... + 13972929236.

Almost surely, 2^55891716938 is an apocalyptic number.

55891716938 is a deficient number, since it is larger than the sum of its proper divisors (27945858472).

55891716938 is a wasteful number, since it uses less digits than its factorization.

55891716938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27945858471.

The product of its digits is 16329600, while the sum is 62.

The spelling of 55891716938 in words is "fifty-five billion, eight hundred ninety-one million, seven hundred sixteen thousand, nine hundred thirty-eight".