72373856890402 has 4 divisors (see below), whose sum is σ = 108560785335606. Its totient is φ = 36186928445200.

The previous prime is 72373856890367. The next prime is 72373856890453. The reversal of 72373856890402 is 20409865837327.

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., 42755238485001 + 29618618405401 = 6538749^2 + 5442299^2 .

It is a super-2 number, since 2×72373856890402² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18093464222599 + ... + 18093464222602.

Almost surely, 2^{72373856890402} is an apocalyptic number.

72373856890402 is a deficient number, since it is larger than the sum of its proper divisors (36186928445204).

72373856890402 is a wasteful number, since it uses less digits than its factorization.

72373856890402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36186928445203.

The product of its (nonzero) digits is 121927680, while the sum is 64.

The spelling of 72373856890402 in words is "seventy-two trillion, three hundred seventy-three billion, eight hundred fifty-six million, eight hundred ninety thousand, four hundred two".