77997570718 has 8 divisors (see below), whose sum is σ = 117071696448. Its totient is φ = 38973671904.

The previous prime is 77997570697. The next prime is 77997570733. The reversal of 77997570718 is 81707579977.

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

It is a super-2 number, since 2×77997570718² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12552846 + ... + 12559057.

It is an arithmetic number, because the mean of its divisors is an integer number (14633962056).

Almost surely, 2^77997570718 is an apocalyptic number.

77997570718 is a deficient number, since it is larger than the sum of its proper divisors (39074125730).

77997570718 is a wasteful number, since it uses less digits than its factorization.

77997570718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25113458.

The product of its (nonzero) digits is 54454680, while the sum is 67.

The spelling of 77997570718 in words is "seventy-seven billion, nine hundred ninety-seven million, five hundred seventy thousand, seven hundred eighteen".