16195306761 has 6 divisors (see below), whose sum is σ = 23393220890. Its totient is φ = 10796871168.

The previous prime is 16195306709. The next prime is 16195306783. The reversal of 16195306761 is 16760359161.

It can be written as a sum of positive squares in only one way, i.e., 8846531136 + 7348775625 = 94056^2 + 85725^2 .

It is not a de Polignac number, because 16195306761 - 2¹⁵ = 16195273993 is a prime.

It is a super-2 number, since 2×16195306761² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16195306961) 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, 899739256 + ... + 899739273.

Almost surely, 2^16195306761 is an apocalyptic number.

It is an amenable number.

16195306761 is a deficient number, since it is larger than the sum of its proper divisors (7197914129).

16195306761 is a wasteful number, since it uses less digits than its factorization.

16195306761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799478535 (or 1799478532 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 16195306761 in words is "sixteen billion, one hundred ninety-five million, three hundred six thousand, seven hundred sixty-one".