3649101891 has 16 divisors (see below), whose sum is σ = 4913145600. Its totient is φ = 2408924448.

The previous prime is 3649101851. The next prime is 3649101893. The reversal of 3649101891 is 1981019463.

It is not a de Polignac number, because 3649101891 - 2⁷ = 3649101763 is a prime.

It is a super-2 number, since 2×3649101891² = 26631889221799551762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3649101893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 841170 + ... + 845496.

It is an arithmetic number, because the mean of its divisors is an integer number (307071600).

Almost surely, 2^3649101891 is an apocalyptic number.

3649101891 is a deficient number, since it is larger than the sum of its proper divisors (1264043709).

3649101891 is a wasteful number, since it uses less digits than its factorization.

3649101891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7018.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 3649101891 is about 60407.7966077227. The cubic root of 3649101891 is about 1539.5554306491. Note that the first 3 decimals are identical.

The spelling of 3649101891 in words is "three billion, six hundred forty-nine million, one hundred one thousand, eight hundred ninety-one".