861064064513388 has 72 divisors (see below), whose sum is σ = 2257198911938880. Its totient is φ = 287020556038800.

The previous prime is 861064064513377. The next prime is 861064064513407. The reversal of 861064064513388 is 883315460460168.

861064064513388 is a `hidden beast` number, since 8 + 6 + 10 + 6 + 40 + 64 + 513 + 3 + 8 + 8 = 666.

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, 423410383 + ... + 425439161.

It is an arithmetic number, because the mean of its divisors is an integer number (31349984888040).

Almost surely, 2^{861064064513388} is an apocalyptic number.

It is an amenable number.

861064064513388 is an abundant number, since it is smaller than the sum of its proper divisors (1396134847425492).

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

861064064513388 is a wasteful number, since it uses less digits than its factorization.

861064064513388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2465449 (or 2465435 counting only the distinct ones).

The product of its (nonzero) digits is 79626240, while the sum is 63.

The spelling of 861064064513388 in words is "eight hundred sixty-one trillion, sixty-four billion, sixty-four million, five hundred thirteen thousand, three hundred eighty-eight".