861948472752 has 60 divisors (see below), whose sum is σ = 2451803820544. Its totient is φ = 282606053760.

The previous prime is 861948472727. The next prime is 861948472769. The reversal of 861948472752 is 257274849168.

It is a happy number.

861948472752 is a `hidden beast` number, since 8 + 6 + 1 + 94 + 8 + 472 + 75 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 861948472752.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49054768 + ... + 49072335.

Almost surely, 2^861948472752 is an apocalyptic number.

It is an amenable number.

861948472752 is an abundant number, since it is smaller than the sum of its proper divisors (1589855347792).

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

861948472752 is a wasteful number, since it uses less digits than its factorization.

861948472752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98127178 (or 98127169 counting only the distinct ones).

The product of its digits is 54190080, while the sum is 63.

The spelling of 861948472752 in words is "eight hundred sixty-one billion, nine hundred forty-eight million, four hundred seventy-two thousand, seven hundred fifty-two".