16625852661 has 24 divisors (see below), whose sum is σ = 25799582592. Its totient is φ = 9483548800.

The previous prime is 16625852651. The next prime is 16625852687.

16625852661 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 16625852661 - 2⁵ = 16625852629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16625852661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16625852651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1340925 + ... + 1353266.

It is an arithmetic number, because the mean of its divisors is an integer number (1074982608).

Almost surely, 2^16625852661 is an apocalyptic number.

16625852661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16625852661 is a deficient number, since it is larger than the sum of its proper divisors (9173729931).

16625852661 is a wasteful number, since it uses less digits than its factorization.

16625852661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694233 (or 2694222 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 48.

The spelling of 16625852661 in words is "sixteen billion, six hundred twenty-five million, eight hundred fifty-two thousand, six hundred sixty-one".