71079920554 has 4 divisors (see below), whose sum is σ = 106619880834. Its totient is φ = 35539960276.

The previous prime is 71079920519. The next prime is 71079920563. The reversal of 71079920554 is 45502997017.

It is a happy number.

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., 38739293329 + 32340627225 = 196823^2 + 179835^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71079920498 and 71079920507.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17769980137 + ... + 17769980140.

Almost surely, 2^71079920554 is an apocalyptic number.

71079920554 is a deficient number, since it is larger than the sum of its proper divisors (35539960280).

71079920554 is a wasteful number, since it uses less digits than its factorization.

71079920554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35539960279.

The product of its (nonzero) digits is 793800, while the sum is 49.

The spelling of 71079920554 in words is "seventy-one billion, seventy-nine million, nine hundred twenty thousand, five hundred fifty-four".