3640462069 has 4 divisors (see below), whose sum is σ = 3642407596. Its totient is φ = 3638516544.

The previous prime is 3640462051. The next prime is 3640462099. The reversal of 3640462069 is 9602640463.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1547399569 + 2093062500 = 39337^2 + 45750^2 .

It is a cyclic number.

It is not a de Polignac number, because 3640462069 - 2¹⁵ = 3640429301 is a prime.

It is a super-2 number, since 2×3640462069² = 26505928151655521522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640462099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 969954 + ... + 973699.

It is an arithmetic number, because the mean of its divisors is an integer number (910601899).

Almost surely, 2^3640462069 is an apocalyptic number.

It is an amenable number.

3640462069 is a deficient number, since it is larger than the sum of its proper divisors (1945527).

3640462069 is a wasteful number, since it uses less digits than its factorization.

3640462069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945526.

The product of its (nonzero) digits is 186624, while the sum is 40.

The square root of 3640462069 is about 60336.2417540238. The cubic root of 3640462069 is about 1538.3394239994.

The spelling of 3640462069 in words is "three billion, six hundred forty million, four hundred sixty-two thousand, sixty-nine".