78533450025780 has 96 divisors (see below), whose sum is σ = 223502491175040. Its totient is φ = 20598567482880.

The previous prime is 78533450025731. The next prime is 78533450025859. The reversal of 78533450025780 is 8752005433587.

It is a self number, because there is not a number n which added to its sum of digits gives 78533450025780.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 246623706 + ... + 246941934.

It is an arithmetic number, because the mean of its divisors is an integer number (2328150949740).

Almost surely, 2^{78533450025780} is an apocalyptic number.

It is an amenable number.

78533450025780 is an abundant number, since it is smaller than the sum of its proper divisors (144969041149260).

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

78533450025780 is a wasteful number, since it uses less digits than its factorization.

78533450025780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385729 (or 385727 counting only the distinct ones).

The product of its (nonzero) digits is 28224000, while the sum is 57.

The spelling of 78533450025780 in words is "seventy-eight trillion, five hundred thirty-three billion, four hundred fifty million, twenty-five thousand, seven hundred eighty".