72645074307437 has 2 divisors, whose sum is σ = 72645074307438. Its totient is φ = 72645074307436.

The previous prime is 72645074307427. The next prime is 72645074307527. The reversal of 72645074307437 is 73470347054627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40085942171716 + 32559132135721 = 6331346^2 + 5706061^2 .

It is a cyclic number.

It is not a de Polignac number, because 72645074307437 - 2⁸ = 72645074307181 is a prime.

It is a super-2 number, since 2×72645074307437² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72645074307427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36322537153718 + 36322537153719.

It is an arithmetic number, because the mean of its divisors is an integer number (36322537153719).

Almost surely, 2^{72645074307437} is an apocalyptic number.

It is an amenable number.

72645074307437 is a deficient number, since it is larger than the sum of its proper divisors (1).

72645074307437 is an equidigital number, since it uses as much as digits as its factorization.

72645074307437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82978560, while the sum is 59.

The spelling of 72645074307437 in words is "seventy-two trillion, six hundred forty-five billion, seventy-four million, three hundred seven thousand, four hundred thirty-seven".