2015623761131 has 2 divisors, whose sum is σ = 2015623761132. Its totient is φ = 2015623761130.

The previous prime is 2015623761119. The next prime is 2015623761139. The reversal of 2015623761131 is 1311673265102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2015623761131 is a prime.

It is a super-2 number, since 2×2015623761131² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2015623761139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007811880565 + 1007811880566.

It is an arithmetic number, because the mean of its divisors is an integer number (1007811880566).

Almost surely, 2^{2015623761131} is an apocalyptic number.

2015623761131 is a deficient number, since it is larger than the sum of its proper divisors (1).

2015623761131 is an equidigital number, since it uses as much as digits as its factorization.

2015623761131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

It can be divided in two parts, 201562 and 3761131, that added together give a palindrome (3962693).

The spelling of 2015623761131 in words is "two trillion, fifteen billion, six hundred twenty-three million, seven hundred sixty-one thousand, one hundred thirty-one".