78256495542 has 32 divisors (see below), whose sum is σ = 161883187200. Its totient is φ = 25193813760.

The previous prime is 78256495531. The next prime is 78256495553. The reversal of 78256495542 is 24559465287.

It is an interprime number because it is at equal distance from previous prime (78256495531) and next prime (78256495553).

It is a super-2 number, since 2×78256495542² (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 15 ways as a sum of consecutive naturals, for example, 324667 + ... + 511782.

It is an arithmetic number, because the mean of its divisors is an integer number (5058849600).

Almost surely, 2^78256495542 is an apocalyptic number.

78256495542 is an abundant number, since it is smaller than the sum of its proper divisors (83626691658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78256495542 is a wasteful number, since it uses less digits than its factorization.

78256495542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836988.

The product of its digits is 24192000, while the sum is 57.

The spelling of 78256495542 in words is "seventy-eight billion, two hundred fifty-six million, four hundred ninety-five thousand, five hundred forty-two".