72373794554 has 32 divisors (see below), whose sum is σ = 113127252480. Its totient is φ = 34687296000.

The previous prime is 72373794551. The next prime is 72373794557. The reversal of 72373794554 is 45549737327.

It is an interprime number because it is at equal distance from previous prime (72373794551) and next prime (72373794557).

It is a super-2 number, since 2×72373794554² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72373794554.

It is not an unprimeable number, because it can be changed into a prime (72373794551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17225654 + ... + 17229854.

It is an arithmetic number, because the mean of its divisors is an integer number (3535226640).

Almost surely, 2^72373794554 is an apocalyptic number.

72373794554 is a deficient number, since it is larger than the sum of its proper divisors (40753457926).

72373794554 is a wasteful number, since it uses less digits than its factorization.

72373794554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6806.

The product of its digits is 22226400, while the sum is 56.

The spelling of 72373794554 in words is "seventy-two billion, three hundred seventy-three million, seven hundred ninety-four thousand, five hundred fifty-four".