72400217804755 has 8 divisors (see below), whose sum is σ = 87677327984400. Its totient is φ = 57388796498016.

The previous prime is 72400217804753. The next prime is 72400217804771. The reversal of 72400217804755 is 55740871200427.

It is a happy number.

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 72400217804755 - 2¹ = 72400217804753 is a prime.

It is a super-2 number, since 2×72400217804755² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72400217804753) 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, 66422217625 + ... + 66422218714.

It is an arithmetic number, because the mean of its divisors is an integer number (10959665998050).

Almost surely, 2^{72400217804755} is an apocalyptic number.

72400217804755 is a deficient number, since it is larger than the sum of its proper divisors (15277110179645).

72400217804755 is a wasteful number, since it uses less digits than its factorization.

72400217804755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132844436453.

The product of its (nonzero) digits is 4390400, while the sum is 52.

The spelling of 72400217804755 in words is "seventy-two trillion, four hundred billion, two hundred seventeen million, eight hundred four thousand, seven hundred fifty-five".