78180557744 has 20 divisors (see below), whose sum is σ = 151479274200. Its totient is φ = 39089132160.

The previous prime is 78180557713. The next prime is 78180557771. The reversal of 78180557744 is 44775508187.

It is a super-2 number, since 2×78180557744² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78180557744.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849839 + ... + 937329.

It is an arithmetic number, because the mean of its divisors is an integer number (7573963710).

Almost surely, 2^78180557744 is an apocalyptic number.

It is an amenable number.

78180557744 is a deficient number, since it is larger than the sum of its proper divisors (73298716456).

78180557744 is a wasteful number, since it uses less digits than its factorization.

78180557744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143348 (or 143342 counting only the distinct ones).

The product of its (nonzero) digits is 8780800, while the sum is 56.

The spelling of 78180557744 in words is "seventy-eight billion, one hundred eighty million, five hundred fifty-seven thousand, seven hundred forty-four".