77044534640551 has 2 divisors, whose sum is σ = 77044534640552. Its totient is φ = 77044534640550.

The previous prime is 77044534640509. The next prime is 77044534640587. The reversal of 77044534640551 is 15504643544077.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77044534640551 - 2²⁹ = 77043997769639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77044534640492 and 77044534640501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77044534640951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38522267320275 + 38522267320276.

It is an arithmetic number, because the mean of its divisors is an integer number (38522267320276).

Almost surely, 2^{77044534640551} is an apocalyptic number.

77044534640551 is a deficient number, since it is larger than the sum of its proper divisors (1).

77044534640551 is an equidigital number, since it uses as much as digits as its factorization.

77044534640551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224000, while the sum is 55.

The spelling of 77044534640551 in words is "seventy-seven trillion, forty-four billion, five hundred thirty-four million, six hundred forty thousand, five hundred fifty-one".