16031495261 has 8 divisors (see below), whose sum is σ = 16979683320. Its totient is φ = 15083880448.

The previous prime is 16031495243. The next prime is 16031495269. The reversal of 16031495261 is 16259413061.

It can be written as a sum of positive squares in 4 ways, for example, as 1929932761 + 14101562500 = 43931^2 + 118750^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16031495261 - 2¹⁴ = 16031478877 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 (16031495269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85046 + ... + 198231.

It is an arithmetic number, because the mean of its divisors is an integer number (2122460415).

Almost surely, 2^16031495261 is an apocalyptic number.

It is an amenable number.

16031495261 is a deficient number, since it is larger than the sum of its proper divisors (948188059).

16031495261 is a wasteful number, since it uses less digits than its factorization.

16031495261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286623.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 16031495261 in words is "sixteen billion, thirty-one million, four hundred ninety-five thousand, two hundred sixty-one".