78102211020 has 48 divisors (see below), whose sum is σ = 218728860000. Its totient is φ = 20823192576.

The previous prime is 78102211009. The next prime is 78102211063. The reversal of 78102211020 is 2011220187.

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, 189606 + ... + 438354.

It is an arithmetic number, because the mean of its divisors is an integer number (4556851250).

Almost surely, 2^78102211020 is an apocalyptic number.

It is an amenable number.

78102211020 is an abundant number, since it is smaller than the sum of its proper divisors (140626648980).

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

78102211020 is a wasteful number, since it uses less digits than its factorization.

78102211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253994 (or 253992 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 24.

The spelling of 78102211020 in words is "seventy-eight billion, one hundred two million, two hundred eleven thousand, twenty".