16961177831 has 24 divisors (see below), whose sum is σ = 19575899424. Its totient is φ = 14637542400.

The previous prime is 16961177809. The next prime is 16961177837. The reversal of 16961177831 is 13877116961.

It is not a de Polignac number, because 16961177831 - 2⁶ = 16961177767 is a prime.

It is a super-2 number, since 2×16961177831² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16961177831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16961177837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 414275 + ... + 453371.

It is an arithmetic number, because the mean of its divisors is an integer number (815662476).

Almost surely, 2^16961177831 is an apocalyptic number.

16961177831 is a deficient number, since it is larger than the sum of its proper divisors (2614721593).

16961177831 is a wasteful number, since it uses less digits than its factorization.

16961177831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39291 (or 39278 counting only the distinct ones).

The product of its digits is 381024, while the sum is 50.

The spelling of 16961177831 in words is "sixteen billion, nine hundred sixty-one million, one hundred seventy-seven thousand, eight hundred thirty-one".