1625663376 has 120 divisors (see below), whose sum is σ = 4689759360. Its totient is φ = 525305088.

The previous prime is 1625663363. The next prime is 1625663381. The reversal of 1625663376 is 6733665261.

1625663376 is a `hidden beast` number, since 1 + 6 + 2 + 5 + 6 + 633 + 7 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2466535 + ... + 2467193.

It is an arithmetic number, because the mean of its divisors is an integer number (39081328).

Almost surely, 2^1625663376 is an apocalyptic number.

1625663376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1625663376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2344879680).

1625663376 is an abundant number, since it is smaller than the sum of its proper divisors (3064095984).

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

1625663376 is a wasteful number, since it uses less digits than its factorization.

1625663376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173 (or 1164 counting only the distinct ones).

The product of its digits is 816480, while the sum is 45.

The square root of 1625663376 is about 40319.5160685244. The cubic root of 1625663376 is about 1175.8273035314.

The spelling of 1625663376 in words is "one billion, six hundred twenty-five million, six hundred sixty-three thousand, three hundred seventy-six".