77951557763 has 4 divisors (see below), whose sum is σ = 77984189520. Its totient is φ = 77918926008.

The previous prime is 77951557753. The next prime is 77951557813. The reversal of 77951557763 is 36775515977.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77951557763 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77951557696 and 77951557705.

It is not an unprimeable number, because it can be changed into a prime (77951557753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16312295 + ... + 16317072.

It is an arithmetic number, because the mean of its divisors is an integer number (19496047380).

Almost surely, 2^77951557763 is an apocalyptic number.

77951557763 is a deficient number, since it is larger than the sum of its proper divisors (32631757).

77951557763 is a wasteful number, since it uses less digits than its factorization.

77951557763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32631756.

The product of its digits is 48620250, while the sum is 62.

The spelling of 77951557763 in words is "seventy-seven billion, nine hundred fifty-one million, five hundred fifty-seven thousand, seven hundred sixty-three".