2636131457 has 4 divisors (see below), whose sum is σ = 2636242260. Its totient is φ = 2636020656.

The previous prime is 2636131451. The next prime is 2636131481. The reversal of 2636131457 is 7541316362.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 553943296 + 2082188161 = 23536^2 + 45631^2 .

It is a cyclic number.

It is not a de Polignac number, because 2636131457 - 2²² = 2631937153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2636131457.

It is not an unprimeable number, because it can be changed into a prime (2636131451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3518 + ... + 72695.

It is an arithmetic number, because the mean of its divisors is an integer number (659060565).

Almost surely, 2^2636131457 is an apocalyptic number.

It is an amenable number.

2636131457 is a deficient number, since it is larger than the sum of its proper divisors (110803).

2636131457 is an equidigital number, since it uses as much as digits as its factorization.

2636131457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110802.

The product of its digits is 90720, while the sum is 38.

The square root of 2636131457 is about 51343.2708054327. The cubic root of 2636131457 is about 1381.4092334269.

The spelling of 2636131457 in words is "two billion, six hundred thirty-six million, one hundred thirty-one thousand, four hundred fifty-seven".