72451615427 has 32 divisors (see below), whose sum is σ = 79438138560. Its totient is φ = 65808691200.

The previous prime is 72451615417. The next prime is 72451615429.

It is a happy number.

72451615427 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 72451615427 - 2⁶ = 72451615363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72451615429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59728673 + ... + 59729885.

It is an arithmetic number, because the mean of its divisors is an integer number (2482441830).

Almost surely, 2^72451615427 is an apocalyptic number.

72451615427 is a deficient number, since it is larger than the sum of its proper divisors (6986523133).

72451615427 is a wasteful number, since it uses less digits than its factorization.

72451615427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2183.

The product of its digits is 470400, while the sum is 44.

The spelling of 72451615427 in words is "seventy-two billion, four hundred fifty-one million, six hundred fifteen thousand, four hundred twenty-seven".