3640543036155 has 28 divisors (see below), whose sum is σ = 6549981139920. Its totient is φ = 1941622950672.

The previous prime is 3640543036139. The next prime is 3640543036183. The reversal of 3640543036155 is 5516303450463.

3640543036155 is a `hidden beast` number, since 3 + 6 + 40 + 543 + 0 + 3 + 61 + 5 + 5 = 666.

It is not a de Polignac number, because 3640543036155 - 2⁴ = 3640543036139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 3640543036155.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 499384975 + ... + 499392264.

Almost surely, 2^{3640543036155} is an apocalyptic number.

3640543036155 is a deficient number, since it is larger than the sum of its proper divisors (2909438103765).

3640543036155 is an frugal number, since it uses more digits than its factorization.

3640543036155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998777262 (or 998777247 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 45.

The spelling of 3640543036155 in words is "three trillion, six hundred forty billion, five hundred forty-three million, thirty-six thousand, one hundred fifty-five".