3640622977 has 4 divisors (see below), whose sum is σ = 3641018836. Its totient is φ = 3640227120.

The previous prime is 3640622971. The next prime is 3640622987. The reversal of 3640622977 is 7792260463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7792260463 = 13 ⋅599404651.

It can be written as a sum of positive squares in 2 ways, for example, as 784896256 + 2855726721 = 28016^2 + 53439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3640622977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3640622971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183798 + ... + 202639.

It is an arithmetic number, because the mean of its divisors is an integer number (910254709).

Almost surely, 2^3640622977 is an apocalyptic number.

It is an amenable number.

3640622977 is a deficient number, since it is larger than the sum of its proper divisors (395859).

3640622977 is an equidigital number, since it uses as much as digits as its factorization.

3640622977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395858.

The product of its (nonzero) digits is 762048, while the sum is 46.

The square root of 3640622977 is about 60337.5751667234. The cubic root of 3640622977 is about 1538.3620884733.

The spelling of 3640622977 in words is "three billion, six hundred forty million, six hundred twenty-two thousand, nine hundred seventy-seven".