861519164160 has 72 divisors (see below), whose sum is σ = 2751476842800. Its totient is φ = 229738442752.

The previous prime is 861519164141. The next prime is 861519164167. The reversal of 861519164160 is 61461915168.

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 (861519164167) 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, 112173135 + ... + 112180814.

It is an arithmetic number, because the mean of its divisors is an integer number (38214956150).

Almost surely, 2^861519164160 is an apocalyptic number.

861519164160 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

861519164160 is an abundant number, since it is smaller than the sum of its proper divisors (1889957678640).

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

861519164160 is a wasteful number, since it uses less digits than its factorization.

861519164160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224353973 (or 224353959 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 48.

The spelling of 861519164160 in words is "eight hundred sixty-one billion, five hundred nineteen million, one hundred sixty-four thousand, one hundred sixty".