78571508722 has 32 divisors (see below), whose sum is σ = 137481379200. Its totient is φ = 33664070160.

The previous prime is 78571508713. The next prime is 78571508723. The reversal of 78571508722 is 22780517587.

It is a self number, because there is not a number n which added to its sum of digits gives 78571508722.

It is not an unprimeable number, because it can be changed into a prime (78571508723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2792428 + ... + 2820424.

It is an arithmetic number, because the mean of its divisors is an integer number (4296293100).

Almost surely, 2^78571508722 is an apocalyptic number.

78571508722 is a deficient number, since it is larger than the sum of its proper divisors (58909870478).

78571508722 is a wasteful number, since it uses less digits than its factorization.

78571508722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32111 (or 32097 counting only the distinct ones).

The product of its (nonzero) digits is 2195200, while the sum is 52.

The spelling of 78571508722 in words is "seventy-eight billion, five hundred seventy-one million, five hundred eight thousand, seven hundred twenty-two".