72671399993 has 2 divisors, whose sum is σ = 72671399994. Its totient is φ = 72671399992.

The previous prime is 72671399989. The next prime is 72671400007. The reversal of 72671399993 is 39999317627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71049968704 + 1621431289 = 266552^2 + 40267^2 .

It is a cyclic number.

It is not a de Polignac number, because 72671399993 - 2² = 72671399989 is a prime.

It is a super-2 number, since 2×72671399993² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72671399393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36335699996 + 36335699997.

It is an arithmetic number, because the mean of its divisors is an integer number (36335699997).

Almost surely, 2^72671399993 is an apocalyptic number.

It is an amenable number.

72671399993 is a deficient number, since it is larger than the sum of its proper divisors (1).

72671399993 is an equidigital number, since it uses as much as digits as its factorization.

72671399993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34720812, while the sum is 65.

The spelling of 72671399993 in words is "seventy-two billion, six hundred seventy-one million, three hundred ninety-nine thousand, nine hundred ninety-three".