78749082624 has 88 divisors (see below), whose sum is σ = 212424559200. Its totient is φ = 25933348864.

The previous prime is 78749082613. The next prime is 78749082637. The reversal of 78749082624 is 42628094787.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100552 + ... + 409400.

Almost surely, 2^78749082624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78749082624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106212279600).

78749082624 is an abundant number, since it is smaller than the sum of its proper divisors (133675476576).

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

78749082624 is a wasteful number, since it uses less digits than its factorization.

78749082624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308955 (or 308937 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 57.

The spelling of 78749082624 in words is "seventy-eight billion, seven hundred forty-nine million, eighty-two thousand, six hundred twenty-four".