78571681420 has 24 divisors (see below), whose sum is σ = 165021903648. Its totient is φ = 31424601600.

The previous prime is 78571681373. The next prime is 78571681453. The reversal of 78571681420 is 2418617587.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93696 + ... + 407335.

It is an arithmetic number, because the mean of its divisors is an integer number (6875912652).

Almost surely, 2^78571681420 is an apocalyptic number.

It is an amenable number.

78571681420 is an abundant number, since it is smaller than the sum of its proper divisors (86450222228).

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

78571681420 is a wasteful number, since it uses less digits than its factorization.

78571681420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508881 (or 508879 counting only the distinct ones).

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

The spelling of 78571681420 in words is "seventy-eight billion, five hundred seventy-one million, six hundred eighty-one thousand, four hundred twenty".