72531516851 has 8 divisors (see below), whose sum is σ = 74500999104. Its totient is φ = 70588120680.

The previous prime is 72531516839. The next prime is 72531516907. The reversal of 72531516851 is 15861513527.

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

It is a de Polignac number, because none of the positive numbers 2^k-72531516851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72531516251) 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, 6515885 + ... + 6527006.

It is an arithmetic number, because the mean of its divisors is an integer number (9312624888).

Almost surely, 2^72531516851 is an apocalyptic number.

72531516851 is a deficient number, since it is larger than the sum of its proper divisors (1969482253).

72531516851 is a wasteful number, since it uses less digits than its factorization.

72531516851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13043041.

The product of its digits is 252000, while the sum is 44.

The spelling of 72531516851 in words is "seventy-two billion, five hundred thirty-one million, five hundred sixteen thousand, eight hundred fifty-one".