16000491 has 16 divisors (see below), whose sum is σ = 23256576. Its totient is φ = 9725856.

The previous prime is 16000487. The next prime is 16000499. The reversal of 16000491 is 19400061.

It is not a de Polignac number, because 16000491 - 2² = 16000487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16000499) 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, 766 + ... + 5708.

It is an arithmetic number, because the mean of its divisors is an integer number (1453536).

Almost surely, 2^16000491 is an apocalyptic number.

16000491 is a deficient number, since it is larger than the sum of its proper divisors (7256085).

16000491 is a wasteful number, since it uses less digits than its factorization.

16000491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5042.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 16000491 is about 4000.0613745291. The cubic root of 16000491 is about 251.9867875411.

The spelling of 16000491 in words is "sixteen million, four hundred ninety-one", and thus it is an aban number.