78287577375 has 64 divisors (see below), whose sum is σ = 148996343808. Its totient is φ = 35760787200.

The previous prime is 78287577343. The next prime is 78287577383. The reversal of 78287577375 is 57377578287.

It is not a de Polignac number, because 78287577375 - 2⁵ = 78287577343 is a prime.

It is a super-2 number, since 2×78287577375² (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 63 ways as a sum of consecutive naturals, for example, 3577467 + ... + 3599283.

It is an arithmetic number, because the mean of its divisors is an integer number (2328067872).

Almost surely, 2^78287577375 is an apocalyptic number.

78287577375 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78287577375 is a deficient number, since it is larger than the sum of its proper divisors (70708766433).

78287577375 is a wasteful number, since it uses less digits than its factorization.

78287577375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23209 (or 23199 counting only the distinct ones).

The product of its digits is 161347200, while the sum is 66.

The spelling of 78287577375 in words is "seventy-eight billion, two hundred eighty-seven million, five hundred seventy-seven thousand, three hundred seventy-five".