78135856695 has 24 divisors (see below), whose sum is σ = 145853600256. Its totient is φ = 38466883008.

The previous prime is 78135856681. The next prime is 78135856697. The reversal of 78135856695 is 59665853187.

78135856695 is a `hidden beast` number, since 7 + 8 + 13 + 58 + 566 + 9 + 5 = 666.

It is not a de Polignac number, because 78135856695 - 2¹⁴ = 78135840311 is a prime.

It is a super-2 number, since 2×78135856695² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78135856697) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66782199 + ... + 66783368.

It is an arithmetic number, because the mean of its divisors is an integer number (6077233344).

Almost surely, 2^78135856695 is an apocalyptic number.

78135856695 is a deficient number, since it is larger than the sum of its proper divisors (67717743561).

78135856695 is a wasteful number, since it uses less digits than its factorization.

78135856695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133565591 (or 133565588 counting only the distinct ones).

The product of its digits is 54432000, while the sum is 63.

The spelling of 78135856695 in words is "seventy-eight billion, one hundred thirty-five million, eight hundred fifty-six thousand, six hundred ninety-five".