77986137112575 has 96 divisors (see below), whose sum is σ = 133805462402304. Its totient is φ = 40045766307840.

The previous prime is 77986137112523. The next prime is 77986137112607. The reversal of 77986137112575 is 57521173168977.

It is a Cunningham number, because it is equal to 8830976²-1.

It is not a de Polignac number, because 77986137112575 - 2¹³ = 77986137104383 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2569798552 + ... + 2569828898.

It is an arithmetic number, because the mean of its divisors is an integer number (1393806900024).

Almost surely, 2^{77986137112575} is an apocalyptic number.

77986137112575 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

77986137112575 is a deficient number, since it is larger than the sum of its proper divisors (55819325289729).

77986137112575 is a wasteful number, since it uses less digits than its factorization.

77986137112575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40041 (or 40036 counting only the distinct ones).

The product of its digits is 155584800, while the sum is 69.

The spelling of 77986137112575 in words is "seventy-seven trillion, nine hundred eighty-six billion, one hundred thirty-seven million, one hundred twelve thousand, five hundred seventy-five".