1625664501 has 12 divisors (see below), whose sum is σ = 2357540640. Its totient is φ = 1079457000.

The previous prime is 1625664497. The next prime is 1625664511. The reversal of 1625664501 is 1054665261.

1625664501 is a `hidden beast` number, since 1 + 6 + 2 + 5 + 6 + 645 + 0 + 1 = 666.

It is not a de Polignac number, because 1625664501 - 2² = 1625664497 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625664511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 357561 + ... + 362078.

It is an arithmetic number, because the mean of its divisors is an integer number (196461720).

Almost surely, 2^1625664501 is an apocalyptic number.

It is an amenable number.

1625664501 is a deficient number, since it is larger than the sum of its proper divisors (731876139).

1625664501 is a wasteful number, since it uses less digits than its factorization.

1625664501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719896 (or 719893 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1625664501 is about 40319.5300195823. The cubic root of 1625664501 is about 1175.8275747654.

The spelling of 1625664501 in words is "one billion, six hundred twenty-five million, six hundred sixty-four thousand, five hundred one".