72477163021 has 8 divisors (see below), whose sum is σ = 73573391360. Its totient is φ = 71389146528.

The previous prime is 72477162911. The next prime is 72477163039. The reversal of 72477163021 is 12036177427.

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-72477163021 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 (72477163321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2035176 + ... + 2070481.

It is an arithmetic number, because the mean of its divisors is an integer number (9196673920).

Almost surely, 2^72477163021 is an apocalyptic number.

It is an amenable number.

72477163021 is a deficient number, since it is larger than the sum of its proper divisors (1096228339).

72477163021 is a wasteful number, since it uses less digits than its factorization.

72477163021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4105923.

The product of its (nonzero) digits is 98784, while the sum is 40.

The spelling of 72477163021 in words is "seventy-two billion, four hundred seventy-seven million, one hundred sixty-three thousand, twenty-one".