76972644627889 has 2 divisors, whose sum is σ = 76972644627890. Its totient is φ = 76972644627888.

The previous prime is 76972644627881. The next prime is 76972644627971. The reversal of 76972644627889 is 98872644627967.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74411188420864 + 2561456207025 = 8626192^2 + 1600455^2 .

It is a cyclic number.

It is not a de Polignac number, because 76972644627889 - 2³ = 76972644627881 is a prime.

It is a super-2 number, since 2×76972644627889² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (76972644627881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38486322313944 + 38486322313945.

It is an arithmetic number, because the mean of its divisors is an integer number (38486322313945).

Almost surely, 2^{76972644627889} is an apocalyptic number.

It is an amenable number.

76972644627889 is a deficient number, since it is larger than the sum of its proper divisors (1).

76972644627889 is an equidigital number, since it uses as much as digits as its factorization.

76972644627889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24580620288, while the sum is 85.

The spelling of 76972644627889 in words is "seventy-six trillion, nine hundred seventy-two billion, six hundred forty-four million, six hundred twenty-seven thousand, eight hundred eighty-nine".