78422622572 has 96 divisors (see below), whose sum is σ = 164046072960. Its totient is φ = 32103751680.

The previous prime is 78422622557. The next prime is 78422622601. The reversal of 78422622572 is 27522622487.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37539704 + ... + 37541792.

It is an arithmetic number, because the mean of its divisors is an integer number (1708813260).

Almost surely, 2^78422622572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78422622572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82023036480).

78422622572 is an abundant number, since it is smaller than the sum of its proper divisors (85623450388).

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

78422622572 is a wasteful number, since it uses less digits than its factorization.

78422622572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2811 (or 2809 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 47.

The spelling of 78422622572 in words is "seventy-eight billion, four hundred twenty-two million, six hundred twenty-two thousand, five hundred seventy-two".