16671979261 has 16 divisors (see below), whose sum is σ = 19470721536. Its totient is φ = 13977858816.

The previous prime is 16671979231. The next prime is 16671979277. The reversal of 16671979261 is 16297917661.

It is a cyclic number.

It is not a de Polignac number, because 16671979261 - 2¹¹ = 16671977213 is a prime.

It is a super-2 number, since 2×16671979261² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16671979231) 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, 570375 + ... + 598891.

It is an arithmetic number, because the mean of its divisors is an integer number (1216920096).

Almost surely, 2^16671979261 is an apocalyptic number.

It is an amenable number.

16671979261 is a deficient number, since it is larger than the sum of its proper divisors (2798742275).

16671979261 is a wasteful number, since it uses less digits than its factorization.

16671979261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30348.

The product of its digits is 1714608, while the sum is 55.

The spelling of 16671979261 in words is "sixteen billion, six hundred seventy-one million, nine hundred seventy-nine thousand, two hundred sixty-one".