77865055080511 has 8 divisors (see below), whose sum is σ = 78636311295984. Its totient is φ = 77093805043200.

The previous prime is 77865055080481. The next prime is 77865055080529. The reversal of 77865055080511 is 11508055056877.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77865055080511 is a prime.

It is a super-2 number, since 2×77865055080511² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77865055080581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26251996 + ... + 29067118.

It is an arithmetic number, because the mean of its divisors is an integer number (9829538911998).

Almost surely, 2^{77865055080511} is an apocalyptic number.

77865055080511 is a deficient number, since it is larger than the sum of its proper divisors (771256215473).

77865055080511 is a wasteful number, since it uses less digits than its factorization.

77865055080511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3089081.

The product of its (nonzero) digits is 11760000, while the sum is 58.

The spelling of 77865055080511 in words is "seventy-seven trillion, eight hundred sixty-five billion, fifty-five million, eighty thousand, five hundred eleven".