78256301640123 has 4 divisors (see below), whose sum is σ = 104341735520168. Its totient is φ = 52170867760080.

The previous prime is 78256301640109. The next prime is 78256301640173. The reversal of 78256301640123 is 32104610365287.

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

It is not a de Polignac number, because 78256301640123 - 2⁴ = 78256301640107 is a prime.

It is a super-2 number, since 2×78256301640123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78256301640173) 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, 13042716940018 + ... + 13042716940023.

It is an arithmetic number, because the mean of its divisors is an integer number (26085433880042).

Almost surely, 2^{78256301640123} is an apocalyptic number.

78256301640123 is a deficient number, since it is larger than the sum of its proper divisors (26085433880045).

78256301640123 is a wasteful number, since it uses less digits than its factorization.

78256301640123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26085433880044.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 78256301640123 in words is "seventy-eight trillion, two hundred fifty-six billion, three hundred one million, six hundred forty thousand, one hundred twenty-three".