3640139069 has 16 divisors (see below), whose sum is σ = 4285604736. Its totient is φ = 3026548800.

The previous prime is 3640139029. The next prime is 3640139101. The reversal of 3640139069 is 9609310463.

It is a cyclic number.

It is not a de Polignac number, because 3640139069 - 2¹² = 3640134973 is a prime.

It is a super-2 number, since 2×3640139069² = 26501224883320373522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640139029) 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, 64499 + ... + 106959.

It is an arithmetic number, because the mean of its divisors is an integer number (267850296).

Almost surely, 2^3640139069 is an apocalyptic number.

It is an amenable number.

3640139069 is a deficient number, since it is larger than the sum of its proper divisors (645465667).

3640139069 is a wasteful number, since it uses less digits than its factorization.

3640139069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42836.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 3640139069 is about 60333.5650281002. The cubic root of 3640139069 is about 1538.2939262649.

The spelling of 3640139069 in words is "three billion, six hundred forty million, one hundred thirty-nine thousand, sixty-nine".