1656001625 has 16 divisors (see below), whose sum is σ = 2068754688. Its totient is φ = 1323478000.

The previous prime is 1656001621. The next prime is 1656001643. The reversal of 1656001625 is 5261006561.

It is not a de Polignac number, because 1656001625 - 2² = 1656001621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1656001591 and 1656001600.

It is not an unprimeable number, because it can be changed into a prime (1656001621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130304 + ... + 142446.

It is an arithmetic number, because the mean of its divisors is an integer number (129297168).

Almost surely, 2^1656001625 is an apocalyptic number.

It is an amenable number.

1656001625 is a deficient number, since it is larger than the sum of its proper divisors (412753063).

1656001625 is a wasteful number, since it uses less digits than its factorization.

1656001625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13249 (or 13239 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1656001625 is about 40693.9998648449. Note that the first 3 decimals coincide. The cubic root of 1656001625 is about 1183.0967269230.

The spelling of 1656001625 in words is "one billion, six hundred fifty-six million, one thousand, six hundred twenty-five".