78516571000 has 96 divisors (see below), whose sum is σ = 213725444400. Its totient is φ = 26919950400.

The previous prime is 78516570971. The next prime is 78516571039. The reversal of 78516571000 is 17561587.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 752190 + ... + 850189.

Almost surely, 2^78516571000 is an apocalyptic number.

78516571000 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78516571000 is an abundant number, since it is smaller than the sum of its proper divisors (135208873400).

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

78516571000 is a wasteful number, since it uses less digits than its factorization.

78516571000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602414 (or 1602393 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 40.

The spelling of 78516571000 in words is "seventy-eight billion, five hundred sixteen million, five hundred seventy-one thousand".