72706424355 has 24 divisors (see below), whose sum is σ = 131503795488. Its totient is φ = 37090813056.

The previous prime is 72706424341. The next prime is 72706424369. The reversal of 72706424355 is 55342460727.

72706424355 is a `hidden beast` number, since 7 + 270 + 6 + 4 + 24 + 355 = 666.

It is an interprime number because it is at equal distance from previous prime (72706424341) and next prime (72706424369).

It is not a de Polignac number, because 72706424355 - 2²⁵ = 72672869923 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 72706424355.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35122842 + ... + 35124911.

It is an arithmetic number, because the mean of its divisors is an integer number (5479324812).

Almost surely, 2^72706424355 is an apocalyptic number.

72706424355 is a deficient number, since it is larger than the sum of its proper divisors (58797371133).

72706424355 is a wasteful number, since it uses less digits than its factorization.

72706424355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70247787 (or 70247784 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 45.

The spelling of 72706424355 in words is "seventy-two billion, seven hundred six million, four hundred twenty-four thousand, three hundred fifty-five".