77488747087 has 2 divisors, whose sum is σ = 77488747088. Its totient is φ = 77488747086.

The previous prime is 77488747009. The next prime is 77488747153. The reversal of 77488747087 is 78074788477.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77488747087 - 2³⁵ = 43129008719 is a prime.

It is a super-2 number, since 2×77488747087² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77488747187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38744373543 + 38744373544.

It is an arithmetic number, because the mean of its divisors is an integer number (38744373544).

Almost surely, 2^77488747087 is an apocalyptic number.

77488747087 is a deficient number, since it is larger than the sum of its proper divisors (1).

77488747087 is an equidigital number, since it uses as much as digits as its factorization.

77488747087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 137682944, while the sum is 67.

The spelling of 77488747087 in words is "seventy-seven billion, four hundred eighty-eight million, seven hundred forty-seven thousand, eighty-seven".