64143625 has 32 divisors (see below), whose sum is σ = 98542080. Its totient is φ = 40593600.

The previous prime is 64143623. The next prime is 64143631. The reversal of 64143625 is 52634146.

It is not a de Polignac number, because 64143625 - 2¹ = 64143623 is a prime.

It is a super-2 number, since 2×64143625² = 8228809256281250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64143623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8556 + ... + 14194.

It is an arithmetic number, because the mean of its divisors is an integer number (3079440).

Almost surely, 2^64143625 is an apocalyptic number.

64143625 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64143625 is a deficient number, since it is larger than the sum of its proper divisors (34398455).

64143625 is a wasteful number, since it uses less digits than its factorization.

64143625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5674 (or 5664 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 64143625 is about 8008.9715319759. The cubic root of 64143625 is about 400.2989951990.

The spelling of 64143625 in words is "sixty-four million, one hundred forty-three thousand, six hundred twenty-five".