16246657491 has 16 divisors (see below), whose sum is σ = 21757897728. Its totient is φ = 10783368000.

The previous prime is 16246657489. The next prime is 16246657507. The reversal of 16246657491 is 19475664261.

It is a happy number.

It is not a de Polignac number, because 16246657491 - 2¹ = 16246657489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16246657411) 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, 616791 + ... + 642591.

It is an arithmetic number, because the mean of its divisors is an integer number (1359868608).

Almost surely, 2^16246657491 is an apocalyptic number.

16246657491 is a deficient number, since it is larger than the sum of its proper divisors (5511240237).

16246657491 is a wasteful number, since it uses less digits than its factorization.

16246657491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26722.

The product of its digits is 2177280, while the sum is 51.

The spelling of 16246657491 in words is "sixteen billion, two hundred forty-six million, six hundred fifty-seven thousand, four hundred ninety-one".