72163264646641 has 16 divisors (see below), whose sum is σ = 84501387565056. Its totient is φ = 60340986608976.

The previous prime is 72163264646633. The next prime is 72163264646659. The reversal of 72163264646641 is 14664646236127.

It is a cyclic number.

It is not a de Polignac number, because 72163264646641 - 2³ = 72163264646633 is a prime.

It is a super-2 number, since 2×72163264646641² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72163264643641) 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, 357132271 + ... + 357334276.

It is an arithmetic number, because the mean of its divisors is an integer number (5281336722816).

Almost surely, 2^{72163264646641} is an apocalyptic number.

It is an amenable number.

72163264646641 is a deficient number, since it is larger than the sum of its proper divisors (12338122918415).

72163264646641 is a wasteful number, since it uses less digits than its factorization.

72163264646641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714466908.

The product of its digits is 41803776, while the sum is 58.

The spelling of 72163264646641 in words is "seventy-two trillion, one hundred sixty-three billion, two hundred sixty-four million, six hundred forty-six thousand, six hundred forty-one".