77809342615 has 8 divisors (see below), whose sum is σ = 93383957088. Its totient is φ = 62238976800.

The previous prime is 77809342571. The next prime is 77809342657. The reversal of 77809342615 is 51624390877.

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

It is not a de Polignac number, because 77809342615 - 2⁷ = 77809342487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1021732 + ... + 1095241.

It is an arithmetic number, because the mean of its divisors is an integer number (11672994636).

It is a 1-persistent number, because it is pandigital, but 2⋅77809342615 = 155618685230 is not.

Almost surely, 2^77809342615 is an apocalyptic number.

77809342615 is a deficient number, since it is larger than the sum of its proper divisors (15574614473).

77809342615 is a wasteful number, since it uses less digits than its factorization.

77809342615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2124329.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 77809342615 in words is "seventy-seven billion, eight hundred nine million, three hundred forty-two thousand, six hundred fifteen".