15131641261 has 16 divisors (see below), whose sum is σ = 17141539968. Its totient is φ = 13236652800.

The previous prime is 15131641243. The next prime is 15131641289. The reversal of 15131641261 is 16214613151.

It is a cyclic number.

It is not a de Polignac number, because 15131641261 - 2¹¹ = 15131639213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15131641241) 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, 196881 + ... + 262726.

It is an arithmetic number, because the mean of its divisors is an integer number (1071346248).

Almost surely, 2^15131641261 is an apocalyptic number.

15131641261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15131641261 is a deficient number, since it is larger than the sum of its proper divisors (2009898707).

15131641261 is a wasteful number, since it uses less digits than its factorization.

15131641261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459732.

The product of its digits is 4320, while the sum is 31.

The spelling of 15131641261 in words is "fifteen billion, one hundred thirty-one million, six hundred forty-one thousand, two hundred sixty-one".