77514621739 has 16 divisors (see below), whose sum is σ = 83057022720. Its totient is φ = 72180017280.

The previous prime is 77514621733. The next prime is 77514621763. The reversal of 77514621739 is 93712641577.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 77514621739 - 2²⁷ = 77380404011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77514621733) 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, 116269 + ... + 410545.

It is an arithmetic number, because the mean of its divisors is an integer number (5191063920).

Almost surely, 2^77514621739 is an apocalyptic number.

77514621739 is a deficient number, since it is larger than the sum of its proper divisors (5542400981).

77514621739 is a wasteful number, since it uses less digits than its factorization.

77514621739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294630.

The product of its digits is 2222640, while the sum is 52.

The spelling of 77514621739 in words is "seventy-seven billion, five hundred fourteen million, six hundred twenty-one thousand, seven hundred thirty-nine".