78650378534 has 48 divisors (see below), whose sum is σ = 148772697696. Its totient is φ = 30908304000.

The previous prime is 78650378503. The next prime is 78650378557. The reversal of 78650378534 is 43587305687.

It is a self number, because there is not a number n which added to its sum of digits gives 78650378534.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12047 + ... + 396794.

It is an arithmetic number, because the mean of its divisors is an integer number (3099431202).

Almost surely, 2^78650378534 is an apocalyptic number.

78650378534 is a deficient number, since it is larger than the sum of its proper divisors (70122319162).

78650378534 is a wasteful number, since it uses less digits than its factorization.

78650378534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409021 (or 409014 counting only the distinct ones).

The product of its (nonzero) digits is 16934400, while the sum is 56.

The spelling of 78650378534 in words is "seventy-eight billion, six hundred fifty million, three hundred seventy-eight thousand, five hundred thirty-four".