72373856890389 has 16 divisors (see below), whose sum is σ = 96526504446912. Its totient is φ = 48235224498048.

The previous prime is 72373856890367. The next prime is 72373856890453. The reversal of 72373856890389 is 98309865837327.

It is not a de Polignac number, because 72373856890389 - 2¹² = 72373856886293 is a prime.

It is a super-2 number, since 2×72373856890389² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72373856890339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405609777 + ... + 405788169.

It is an arithmetic number, because the mean of its divisors is an integer number (6032906527932).

Almost surely, 2^{72373856890389} is an apocalyptic number.

It is an amenable number.

72373856890389 is a deficient number, since it is larger than the sum of its proper divisors (24152647556523).

72373856890389 is a wasteful number, since it uses less digits than its factorization.

72373856890389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216916.

The product of its (nonzero) digits is 3292047360, while the sum is 78.

The spelling of 72373856890389 in words is "seventy-two trillion, three hundred seventy-three billion, eight hundred fifty-six million, eight hundred ninety thousand, three hundred eighty-nine".