72969066554 has 4 divisors (see below), whose sum is σ = 109453599834. Its totient is φ = 36484533276.

The previous prime is 72969066509. The next prime is 72969066581. The reversal of 72969066554 is 45566096927.

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., 63023592025 + 9945474529 = 251045^2 + 99727^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72969066493 and 72969066502.

It is an unprimeable number.

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, 18242266637 + ... + 18242266640.

Almost surely, 2^72969066554 is an apocalyptic number.

72969066554 is a deficient number, since it is larger than the sum of its proper divisors (36484533280).

72969066554 is a wasteful number, since it uses less digits than its factorization.

72969066554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36484533279.

The product of its (nonzero) digits is 24494400, while the sum is 59.

The spelling of 72969066554 in words is "seventy-two billion, nine hundred sixty-nine million, sixty-six thousand, five hundred fifty-four".