78855552075 has 24 divisors (see below), whose sum is σ = 130555929600. Its totient is φ = 41997772960.

The previous prime is 78855552053. The next prime is 78855552131. The reversal of 78855552075 is 57025555887.

It is not a de Polignac number, because 78855552075 - 2¹⁰ = 78855551051 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 677235 + ... + 785084.

It is an arithmetic number, because the mean of its divisors is an integer number (5439830400).

Almost surely, 2^78855552075 is an apocalyptic number.

78855552075 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78855552075 is a deficient number, since it is larger than the sum of its proper divisors (51700377525).

78855552075 is a wasteful number, since it uses less digits than its factorization.

78855552075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463051 (or 1463046 counting only the distinct ones).

The product of its (nonzero) digits is 19600000, while the sum is 57.

The spelling of 78855552075 in words is "seventy-eight billion, eight hundred fifty-five million, five hundred fifty-two thousand, seventy-five".