3640561455 has 8 divisors (see below), whose sum is σ = 5824898352. Its totient is φ = 1941632768.

The previous prime is 3640561453. The next prime is 3640561489. The reversal of 3640561455 is 5541650463.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3640561455 - 2¹ = 3640561453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640561453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121352034 + ... + 121352063.

It is an arithmetic number, because the mean of its divisors is an integer number (728112294).

Almost surely, 2^3640561455 is an apocalyptic number.

3640561455 is a deficient number, since it is larger than the sum of its proper divisors (2184336897).

3640561455 is a wasteful number, since it uses less digits than its factorization.

3640561455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242704105.

The product of its (nonzero) digits is 216000, while the sum is 39.

The square root of 3640561455 is about 60337.0653495842. The cubic root of 3640561455 is about 1538.3534229559.

The spelling of 3640561455 in words is "three billion, six hundred forty million, five hundred sixty-one thousand, four hundred fifty-five".