861775928460 has 96 divisors (see below), whose sum is σ = 2681428881600. Its totient is φ = 229777067520.

The previous prime is 861775928449. The next prime is 861775928473. The reversal of 861775928460 is 64829577168.

861775928460 is a `hidden beast` number, since 8 + 6 + 17 + 75 + 92 + 8 + 460 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

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, 4225230 + ... + 4424490.

It is an arithmetic number, because the mean of its divisors is an integer number (27931550850).

Almost surely, 2^861775928460 is an apocalyptic number.

It is an amenable number.

861775928460 is an abundant number, since it is smaller than the sum of its proper divisors (1819652953140).

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

861775928460 is a wasteful number, since it uses less digits than its factorization.

861775928460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207288 (or 207280 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 63.

The spelling of 861775928460 in words is "eight hundred sixty-one billion, seven hundred seventy-five million, nine hundred twenty-eight thousand, four hundred sixty".