3642788491 has 4 divisors (see below), whose sum is σ = 3741242272. Its totient is φ = 3544334712.

The previous prime is 3642788467. The next prime is 3642788521. The reversal of 3642788491 is 1948872463.

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 3642788491 - 2⁷ = 3642788363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3642788431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49226835 + ... + 49226908.

It is an arithmetic number, because the mean of its divisors is an integer number (935310568).

Almost surely, 2^3642788491 is an apocalyptic number.

3642788491 is a deficient number, since it is larger than the sum of its proper divisors (98453781).

3642788491 is an equidigital number, since it uses as much as digits as its factorization.

3642788491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98453780.

The product of its digits is 2322432, while the sum is 52.

The square root of 3642788491 is about 60355.5174859764. The cubic root of 3642788491 is about 1538.6670440045.

The spelling of 3642788491 in words is "three billion, six hundred forty-two million, seven hundred eighty-eight thousand, four hundred ninety-one".