3640220277 has 4 divisors (see below), whose sum is σ = 4853627040. Its totient is φ = 2426813516.

The previous prime is 3640220267. The next prime is 3640220293. The reversal of 3640220277 is 7720220463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7720220463 = 3 ⋅2573406821.

It is a cyclic number.

It is not a de Polignac number, because 3640220277 - 2¹⁶ = 3640154741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640220257) 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, 606703377 + ... + 606703382.

It is an arithmetic number, because the mean of its divisors is an integer number (1213406760).

Almost surely, 2^3640220277 is an apocalyptic number.

It is an amenable number.

3640220277 is a deficient number, since it is larger than the sum of its proper divisors (1213406763).

3640220277 is a wasteful number, since it uses less digits than its factorization.

3640220277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213406762.

The product of its (nonzero) digits is 28224, while the sum is 33.

The square root of 3640220277 is about 60334.2380162375. The cubic root of 3640220277 is about 1538.3053654656.

The spelling of 3640220277 in words is "three billion, six hundred forty million, two hundred twenty thousand, two hundred seventy-seven".