3664011781 has 16 divisors (see below), whose sum is σ = 3829690368. Its totient is φ = 3502540800.

The previous prime is 3664011733. The next prime is 3664011797. The reversal of 3664011781 is 1871104663.

It is a cyclic number.

It is not a de Polignac number, because 3664011781 - 2²³ = 3655623173 is a prime.

It is a super-2 number, since 2×3664011781² = 26849964662613583922, which contains 22 as substring.

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 3664011781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3664041781) 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 15 ways as a sum of consecutive naturals, for example, 526716 + ... + 533626.

It is an arithmetic number, because the mean of its divisors is an integer number (239355648).

Almost surely, 2^3664011781 is an apocalyptic number.

It is an amenable number.

3664011781 is a deficient number, since it is larger than the sum of its proper divisors (165678587).

3664011781 is a wasteful number, since it uses less digits than its factorization.

3664011781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7212.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 3664011781 is about 60531.0811154071. The cubic root of 3664011781 is about 1541.6494079367.

The spelling of 3664011781 in words is "three billion, six hundred sixty-four million, eleven thousand, seven hundred eighty-one".