72155146553 has 8 divisors (see below), whose sum is σ = 82659837120. Its totient is φ = 61699659120.

The previous prime is 72155146549. The next prime is 72155146649. The reversal of 72155146553 is 35564155127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72155146553 - 2² = 72155146549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72155146153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12297638 + ... + 12303503.

It is an arithmetic number, because the mean of its divisors is an integer number (10332479640).

Almost surely, 2^72155146553 is an apocalyptic number.

It is an amenable number.

72155146553 is a deficient number, since it is larger than the sum of its proper divisors (10504690567).

72155146553 is a wasteful number, since it uses less digits than its factorization.

72155146553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24601567.

The product of its digits is 630000, while the sum is 44.

The spelling of 72155146553 in words is "seventy-two billion, one hundred fifty-five million, one hundred forty-six thousand, five hundred fifty-three".