3640852961 has 4 divisors (see below), whose sum is σ = 3676201152. Its totient is φ = 3605504772.

The previous prime is 3640852927. The next prime is 3640852987. The reversal of 3640852961 is 1692580463.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3640852961 is a prime.

It is a super-3 number, since 3×3640852961³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3640855961) 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, 17673941 + ... + 17674146.

It is an arithmetic number, because the mean of its divisors is an integer number (919050288).

Almost surely, 2^3640852961 is an apocalyptic number.

It is an amenable number.

3640852961 is a deficient number, since it is larger than the sum of its proper divisors (35348191).

3640852961 is a wasteful number, since it uses less digits than its factorization.

3640852961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35348190.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 3640852961 is about 60339.4809473863. The cubic root of 3640852961 is about 1538.3944813924.

The spelling of 3640852961 in words is "three billion, six hundred forty million, eight hundred fifty-two thousand, nine hundred sixty-one".