72411737621591 has 2 divisors, whose sum is σ = 72411737621592. Its totient is φ = 72411737621590.

The previous prime is 72411737621539. The next prime is 72411737621599. The reversal of 72411737621591 is 19512673711427.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72411737621591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72411737621599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36205868810795 + 36205868810796.

It is an arithmetic number, because the mean of its divisors is an integer number (36205868810796).

Almost surely, 2^{72411737621591} is an apocalyptic number.

72411737621591 is a deficient number, since it is larger than the sum of its proper divisors (1).

72411737621591 is an equidigital number, since it uses as much as digits as its factorization.

72411737621591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4445280, while the sum is 56.

The spelling of 72411737621591 in words is "seventy-two trillion, four hundred eleven billion, seven hundred thirty-seven million, six hundred twenty-one thousand, five hundred ninety-one".