3645957818 has 8 divisors (see below), whose sum is σ = 5525317812. Its totient is φ = 1804185216.

The previous prime is 3645957803. The next prime is 3645957851. The reversal of 3645957818 is 8187595463.

It can be written as a sum of positive squares in 2 ways, for example, as 3477814729 + 168143089 = 58973^2 + 12967^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×3645957818² = 26586016821270642248, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9396605 + ... + 9396992.

Almost surely, 2^3645957818 is an apocalyptic number.

3645957818 is a deficient number, since it is larger than the sum of its proper divisors (1879359994).

3645957818 is a wasteful number, since it uses less digits than its factorization.

3645957818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18793696.

The product of its digits is 7257600, while the sum is 56.

The square root of 3645957818 is about 60381.7672646305. The cubic root of 3645957818 is about 1539.1131423218.

The spelling of 3645957818 in words is "three billion, six hundred forty-five million, nine hundred fifty-seven thousand, eight hundred eighteen".