72507251455 has 4 divisors (see below), whose sum is σ = 87008701752. Its totient is φ = 58005801160.

The previous prime is 72507251447. The next prime is 72507251459. The reversal of 72507251455 is 55415270527.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 72507251455 - 2³ = 72507251447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72507251459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7250725141 + ... + 7250725150.

It is an arithmetic number, because the mean of its divisors is an integer number (21752175438).

Almost surely, 2^72507251455 is an apocalyptic number.

72507251455 is a deficient number, since it is larger than the sum of its proper divisors (14501450297).

72507251455 is a wasteful number, since it uses less digits than its factorization.

72507251455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14501450296.

The product of its (nonzero) digits is 490000, while the sum is 43.

The spelling of 72507251455 in words is "seventy-two billion, five hundred seven million, two hundred fifty-one thousand, four hundred fifty-five".