77479863551 has 2 divisors, whose sum is σ = 77479863552. Its totient is φ = 77479863550.

The previous prime is 77479863521. The next prime is 77479863563. The reversal of 77479863551 is 15536897477.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77479863551 - 2¹⁰ = 77479862527 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77479863511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38739931775 + 38739931776.

It is an arithmetic number, because the mean of its divisors is an integer number (38739931776).

Almost surely, 2^77479863551 is an apocalyptic number.

77479863551 is a deficient number, since it is larger than the sum of its proper divisors (1).

77479863551 is an equidigital number, since it uses as much as digits as its factorization.

77479863551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44452800, while the sum is 62.

The spelling of 77479863551 in words is "seventy-seven billion, four hundred seventy-nine million, eight hundred sixty-three thousand, five hundred fifty-one".