16158491 has 2 divisors, whose sum is σ = 16158492. Its totient is φ = 16158490.

The previous prime is 16158463. The next prime is 16158521. The reversal of 16158491 is 19485161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16158491 - 2¹⁴ = 16142107 is a prime.

It is a super-2 number, since 2×16158491² = 522193662794162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16158431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8079245 + 8079246.

It is an arithmetic number, because the mean of its divisors is an integer number (8079246).

Almost surely, 2^16158491 is an apocalyptic number.

16158491 is a deficient number, since it is larger than the sum of its proper divisors (1).

16158491 is an equidigital number, since it uses as much as digits as its factorization.

16158491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 35.

The square root of 16158491 is about 4019.7625551766. The cubic root of 16158491 is about 252.8135033496.

The spelling of 16158491 in words is "sixteen million, one hundred fifty-eight thousand, four hundred ninety-one".