16139641 has 8 divisors (see below), whose sum is σ = 18470144. Its totient is φ = 13815360.

The previous prime is 16139611. The next prime is 16139671. The reversal of 16139641 is 14693161.

It is an interprime number because it is at equal distance from previous prime (16139611) and next prime (16139671).

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

It is a cyclic number.

It is not a de Polignac number, because 16139641 - 2¹³ = 16131449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16139611) 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, 7681 + ... + 9553.

It is an arithmetic number, because the mean of its divisors is an integer number (2308768).

Almost surely, 2^16139641 is an apocalyptic number.

It is an amenable number.

16139641 is a deficient number, since it is larger than the sum of its proper divisors (2330503).

16139641 is a wasteful number, since it uses less digits than its factorization.

16139641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3111.

The product of its digits is 3888, while the sum is 31.

The square root of 16139641 is about 4017.4172051207. The cubic root of 16139641 is about 252.7151569374.

The spelling of 16139641 in words is "sixteen million, one hundred thirty-nine thousand, six hundred forty-one".