872144595880 has 16 divisors (see below), whose sum is σ = 1962325340820. Its totient is φ = 348857838336.

The previous prime is 872144595853. The next prime is 872144595887. The reversal of 872144595880 is 88595441278.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 848045759236 + 24098836644 = 920894^2 + 155238^2 .

It is a super-2 number, since 2×872144595880² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (872144595887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10901807409 + ... + 10901807488.

Almost surely, 2^872144595880 is an apocalyptic number.

It is an amenable number.

872144595880 is an abundant number, since it is smaller than the sum of its proper divisors (1090180744940).

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

872144595880 is a wasteful number, since it uses less digits than its factorization.

872144595880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21803614908 (or 21803614904 counting only the distinct ones).

The product of its (nonzero) digits is 25804800, while the sum is 61.

The spelling of 872144595880 in words is "eight hundred seventy-two billion, one hundred forty-four million, five hundred ninety-five thousand, eight hundred eighty".