78157183454 has 8 divisors (see below), whose sum is σ = 133983743088. Its totient is φ = 33495935760.

The previous prime is 78157183427. The next prime is 78157183513. The reversal of 78157183454 is 45438175187.

It is a happy number.

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

It is a super-2 number, since 2×78157183454² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78157183396 and 78157183405.

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, 2791327967 + ... + 2791327994.

It is an arithmetic number, because the mean of its divisors is an integer number (16747967886).

Almost surely, 2^78157183454 is an apocalyptic number.

78157183454 is a deficient number, since it is larger than the sum of its proper divisors (55826559634).

78157183454 is a wasteful number, since it uses less digits than its factorization.

78157183454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5582655970.

The product of its digits is 3763200, while the sum is 53.

The spelling of 78157183454 in words is "seventy-eight billion, one hundred fifty-seven million, one hundred eighty-three thousand, four hundred fifty-four".