78742976256 has 144 divisors (see below), whose sum is σ = 266122259200. Its totient is φ = 22497979392.

The previous prime is 78742976251. The next prime is 78742976261. The reversal of 78742976256 is 65267924787.

It is an interprime number because it is at equal distance from previous prime (78742976251) and next prime (78742976261).

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 78742976193 and 78742976202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78742976251) 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, 765346 + ... + 862113.

Almost surely, 2^78742976256 is an apocalyptic number.

It is an amenable number.

78742976256 is an abundant number, since it is smaller than the sum of its proper divisors (187379282944).

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

78742976256 is a wasteful number, since it uses less digits than its factorization.

78742976256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627491 (or 1627471 counting only the distinct ones).

The product of its digits is 71124480, while the sum is 63.

The spelling of 78742976256 in words is "seventy-eight billion, seven hundred forty-two million, nine hundred seventy-six thousand, two hundred fifty-six".