78254013959 has 16 divisors (see below), whose sum is σ = 89308776960. Its totient is φ = 67871955360.

The previous prime is 78254013881. The next prime is 78254013977. The reversal of 78254013959 is 95931045287.

It is not a de Polignac number, because 78254013959 - 2²⁴ = 78237236743 is a prime.

It is a super-2 number, since 2×78254013959² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78254013959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78254013979) 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, 299147 + ... + 495980.

It is an arithmetic number, because the mean of its divisors is an integer number (5581798560).

Almost surely, 2^78254013959 is an apocalyptic number.

78254013959 is a deficient number, since it is larger than the sum of its proper divisors (11054763001).

78254013959 is a wasteful number, since it uses less digits than its factorization.

78254013959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795550.

The product of its (nonzero) digits is 2721600, while the sum is 53.

The spelling of 78254013959 in words is "seventy-eight billion, two hundred fifty-four million, thirteen thousand, nine hundred fifty-nine".