16480649691 has 40 divisors (see below), whose sum is σ = 27723767808. Its totient is φ = 9666054000.

The previous prime is 16480649659. The next prime is 16480649707. The reversal of 16480649691 is 19694608461.

It is a happy number.

16480649691 is a `hidden beast` number, since 1 + 64 + 8 + 0 + 6 + 496 + 91 = 666.

It is not a de Polignac number, because 16480649691 - 2⁵ = 16480649659 is a prime.

It is a super-2 number, since 2×16480649691² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16480649611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 270715 + ... + 325956.

Almost surely, 2^16480649691 is an apocalyptic number.

16480649691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16480649691 is a deficient number, since it is larger than the sum of its proper divisors (11243118117).

16480649691 is a wasteful number, since it uses less digits than its factorization.

16480649691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596725 (or 596716 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 16480649691 in words is "sixteen billion, four hundred eighty million, six hundred forty-nine thousand, six hundred ninety-one".