78780860500 has 48 divisors (see below), whose sum is σ = 172124918784. Its totient is φ = 31499978400.

The previous prime is 78780860447. The next prime is 78780860551. The reversal of 78780860500 is 506808787.

It is a super-2 number, since 2×78780860500² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1301917 + ... + 1361083.

It is an arithmetic number, because the mean of its divisors is an integer number (3585935808).

Almost surely, 2^78780860500 is an apocalyptic number.

It is an amenable number.

78780860500 is an abundant number, since it is smaller than the sum of its proper divisors (93344058284).

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

78780860500 is a wasteful number, since it uses less digits than its factorization.

78780860500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61849 (or 61837 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 49.

The spelling of 78780860500 in words is "seventy-eight billion, seven hundred eighty million, eight hundred sixty thousand, five hundred".