2636315491 has 4 divisors (see below), whose sum is σ = 2637898632. Its totient is φ = 2634732352.

The previous prime is 2636315489. The next prime is 2636315519. The reversal of 2636315491 is 1945136362.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2636315491 - 2¹ = 2636315489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2636315411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 789070 + ... + 792403.

It is an arithmetic number, because the mean of its divisors is an integer number (659474658).

Almost surely, 2^2636315491 is an apocalyptic number.

2636315491 is a deficient number, since it is larger than the sum of its proper divisors (1583141).

2636315491 is a wasteful number, since it uses less digits than its factorization.

2636315491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583140.

The product of its digits is 116640, while the sum is 40.

The square root of 2636315491 is about 51345.0629661704. The cubic root of 2636315491 is about 1381.4413790609.

The spelling of 2636315491 in words is "two billion, six hundred thirty-six million, three hundred fifteen thousand, four hundred ninety-one".