78351873625423 has 4 divisors (see below), whose sum is σ = 78354302645920. Its totient is φ = 78349444604928.

The previous prime is 78351873625409. The next prime is 78351873625469. The reversal of 78351873625423 is 32452637815387.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78351873625423 - 2³³ = 78343283690831 is a prime.

It is a super-2 number, since 2×78351873625423² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78351873623423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1214461863 + ... + 1214526376.

It is an arithmetic number, because the mean of its divisors is an integer number (19588575661480).

Almost surely, 2^{78351873625423} is an apocalyptic number.

78351873625423 is a deficient number, since it is larger than the sum of its proper divisors (2429020497).

78351873625423 is a wasteful number, since it uses less digits than its factorization.

78351873625423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429020496.

The product of its digits is 203212800, while the sum is 64.

The spelling of 78351873625423 in words is "seventy-eight trillion, three hundred fifty-one billion, eight hundred seventy-three million, six hundred twenty-five thousand, four hundred twenty-three".