78155870854 has 8 divisors (see below), whose sum is σ = 118020610800. Its totient is φ = 38815667256.

The previous prime is 78155870801. The next prime is 78155870887. The reversal of 78155870854 is 45807855187.

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

It is a super-2 number, since 2×78155870854² (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 3 ways as a sum of consecutive naturals, for example, 131133714 + ... + 131134309.

It is an arithmetic number, because the mean of its divisors is an integer number (14752576350).

Almost surely, 2^78155870854 is an apocalyptic number.

78155870854 is a deficient number, since it is larger than the sum of its proper divisors (39864739946).

78155870854 is a wasteful number, since it uses less digits than its factorization.

78155870854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262268174.

The product of its (nonzero) digits is 12544000, while the sum is 58.

The spelling of 78155870854 in words is "seventy-eight billion, one hundred fifty-five million, eight hundred seventy thousand, eight hundred fifty-four".