1625384864 has 48 divisors (see below), whose sum is σ = 3330059040. Its totient is φ = 780299520.

The previous prime is 1625384863. The next prime is 1625384869. The reversal of 1625384864 is 4684835261.

It is a super-2 number, since 2×1625384864² = 5283751912240596992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1625384863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71174 + ... + 91194.

It is an arithmetic number, because the mean of its divisors is an integer number (69376230).

Almost surely, 2^1625384864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1625384864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1665029520).

1625384864 is an abundant number, since it is smaller than the sum of its proper divisors (1704674176).

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

1625384864 is a wasteful number, since it uses less digits than its factorization.

1625384864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20133 (or 20125 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 47.

The square root of 1625384864 is about 40316.0621092884. The cubic root of 1625384864 is about 1175.7601513107.

The spelling of 1625384864 in words is "one billion, six hundred twenty-five million, three hundred eighty-four thousand, eight hundred sixty-four".