78235572854 has 32 divisors (see below), whose sum is σ = 121541618016. Its totient is φ = 37740764160.

The previous prime is 78235572787. The next prime is 78235572859. The reversal of 78235572854 is 45827553287.

It is a super-2 number, since 2×78235572854² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 78235572854.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78235572859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4719809 + ... + 4736355.

It is an arithmetic number, because the mean of its divisors is an integer number (3798175563).

Almost surely, 2^78235572854 is an apocalyptic number.

78235572854 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

78235572854 is a deficient number, since it is larger than the sum of its proper divisors (43306045162).

78235572854 is a wasteful number, since it uses less digits than its factorization.

78235572854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17120.

The product of its digits is 18816000, while the sum is 56.

The spelling of 78235572854 in words is "seventy-eight billion, two hundred thirty-five million, five hundred seventy-two thousand, eight hundred fifty-four".