16777631213 has 6 divisors (see below), whose sum is σ = 19516836366. Its totient is φ = 14380826712.

The previous prime is 16777631209. The next prime is 16777631243. The reversal of 16777631213 is 31213677761.

It can be written as a sum of positive squares in only one way, i.e., 15980246569 + 797384644 = 126413^2 + 28238^2 .

It is not a de Polignac number, because 16777631213 - 2² = 16777631209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16777631243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 171200270 + ... + 171200367.

It is an arithmetic number, because the mean of its divisors is an integer number (3252806061).

Almost surely, 2^16777631213 is an apocalyptic number.

It is an amenable number.

16777631213 is a deficient number, since it is larger than the sum of its proper divisors (2739205153).

16777631213 is an equidigital number, since it uses as much as digits as its factorization.

16777631213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342400651 (or 342400644 counting only the distinct ones).

The product of its digits is 222264, while the sum is 44.

The spelling of 16777631213 in words is "sixteen billion, seven hundred seventy-seven million, six hundred thirty-one thousand, two hundred thirteen".