72163606451 has 16 divisors (see below), whose sum is σ = 73850766240. Its totient is φ = 70496870400.

The previous prime is 72163606399. The next prime is 72163606513. The reversal of 72163606451 is 15460636127.

It is a cyclic number.

It is not a de Polignac number, because 72163606451 - 2²² = 72159412147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72163606399 and 72163606408.

It is not an unprimeable number, because it can be changed into a prime (72163606651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3934001 + ... + 3952301.

It is an arithmetic number, because the mean of its divisors is an integer number (4615672890).

Almost surely, 2^72163606451 is an apocalyptic number.

72163606451 is a deficient number, since it is larger than the sum of its proper divisors (1687159789).

72163606451 is a wasteful number, since it uses less digits than its factorization.

72163606451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18854.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 72163606451 in words is "seventy-two billion, one hundred sixty-three million, six hundred six thousand, four hundred fifty-one".