16625601 has 16 divisors (see below), whose sum is σ = 24696000. Its totient is φ = 11054304.

The previous prime is 16625597. The next prime is 16625663. The reversal of 16625601 is 10652661.

It is a happy number.

It is not a de Polignac number, because 16625601 - 2² = 16625597 is a prime.

It is a super-2 number, since 2×16625601² = 552821217222402, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (16625681) 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, 15325 + ... + 16373.

It is an arithmetic number, because the mean of its divisors is an integer number (1543500).

Almost surely, 2^16625601 is an apocalyptic number.

It is an amenable number.

16625601 is a deficient number, since it is larger than the sum of its proper divisors (8070399).

16625601 is a wasteful number, since it uses less digits than its factorization.

16625601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645 (or 1639 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 16625601 is about 4077.4503062576. The cubic root of 16625601 is about 255.2265115374.

The spelling of 16625601 in words is "sixteen million, six hundred twenty-five thousand, six hundred one".