16689081625 has 16 divisors (see below), whose sum is σ = 20831765760. Its totient is φ = 13348834800.

The previous prime is 16689081587. The next prime is 16689081637. The reversal of 16689081625 is 52618098661.

It is not a de Polignac number, because 16689081625 - 2¹³ = 16689073433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1040416 + ... + 1056334.

It is an arithmetic number, because the mean of its divisors is an integer number (1301985360).

Almost surely, 2^16689081625 is an apocalyptic number.

It is an amenable number.

16689081625 is a deficient number, since it is larger than the sum of its proper divisors (4142684135).

16689081625 is an equidigital number, since it uses as much as digits as its factorization.

16689081625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24321 (or 24311 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 16689081625 in words is "sixteen billion, six hundred eighty-nine million, eighty-one thousand, six hundred twenty-five".