16961557 has 8 divisors (see below), whose sum is σ = 18270720. Its totient is φ = 15700080.

The previous prime is 16961551. The next prime is 16961561. The reversal of 16961557 is 75516961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16961557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16961551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11182 + ... + 12607.

It is an arithmetic number, because the mean of its divisors is an integer number (2283840).

Almost surely, 2^16961557 is an apocalyptic number.

It is an amenable number.

16961557 is a deficient number, since it is larger than the sum of its proper divisors (1309163).

16961557 is a wasteful number, since it uses less digits than its factorization.

16961557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23843.

The product of its digits is 56700, while the sum is 40.

The square root of 16961557 is about 4118.4410885674. The cubic root of 16961557 is about 256.9341936112.

The spelling of 16961557 in words is "sixteen million, nine hundred sixty-one thousand, five hundred fifty-seven".