77208805139 has 8 divisors (see below), whose sum is σ = 80153416560. Its totient is φ = 74283009696.

The previous prime is 77208805109. The next prime is 77208805147. The reversal of 77208805139 is 93150880277.

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

It is a cyclic number.

It is not a de Polignac number, because 77208805139 - 2²⁴ = 77192027923 is a prime.

It is a super-2 number, since 2×77208805139² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77208805109) 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, 4695632 + ... + 4712045.

It is an arithmetic number, because the mean of its divisors is an integer number (10019177070).

Almost surely, 2^77208805139 is an apocalyptic number.

77208805139 is a deficient number, since it is larger than the sum of its proper divisors (2944611421).

77208805139 is a wasteful number, since it uses less digits than its factorization.

77208805139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9407989.

The product of its (nonzero) digits is 846720, while the sum is 50.

The spelling of 77208805139 in words is "seventy-seven billion, two hundred eight million, eight hundred five thousand, one hundred thirty-nine".