3640665033025 has 24 divisors (see below), whose sum is σ = 4688357789984. Its totient is φ = 2802338985600.

The previous prime is 3640665033023. The next prime is 3640665033073. The reversal of 3640665033025 is 5203305660463.

It is not a de Polignac number, because 3640665033025 - 2¹ = 3640665033023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3640665033023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25201596 + ... + 25345645.

Almost surely, 2^{3640665033025} is an apocalyptic number.

It is an amenable number.

3640665033025 is a deficient number, since it is larger than the sum of its proper divisors (1047692756959).

3640665033025 is a wasteful number, since it uses less digits than its factorization.

3640665033025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50547361 (or 50547356 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 43.

The spelling of 3640665033025 in words is "three trillion, six hundred forty billion, six hundred sixty-five million, thirty-three thousand, twenty-five".