861128252832 has 48 divisors (see below), whose sum is σ = 2266426038240. Its totient is φ = 286285370112.

The previous prime is 861128252821. The next prime is 861128252833. The reversal of 861128252832 is 238252821168.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (861128252833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11797503 + ... + 11870270.

It is an arithmetic number, because the mean of its divisors is an integer number (47217209130).

Almost surely, 2^861128252832 is an apocalyptic number.

It is an amenable number.

861128252832 is an abundant number, since it is smaller than the sum of its proper divisors (1405297785408).

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

861128252832 is a wasteful number, since it uses less digits than its factorization.

861128252832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23668165 (or 23668157 counting only the distinct ones).

The product of its digits is 737280, while the sum is 48.

The spelling of 861128252832 in words is "eight hundred sixty-one billion, one hundred twenty-eight million, two hundred fifty-two thousand, eight hundred thirty-two".