6635765632545 has 24 divisors (see below), whose sum is σ = 13145135729856. Its totient is φ = 3033492860448.

The previous prime is 6635765632523. The next prime is 6635765632567. The reversal of 6635765632545 is 5452365675366.

It is a happy number.

6635765632545 is a `hidden beast` number, since 6 + 6 + 3 + 5 + 7 + 6 + 56 + 32 + 545 = 666.

It is an interprime number because it is at equal distance from previous prime (6635765632523) and next prime (6635765632567).

It is not a de Polignac number, because 6635765632545 - 2⁵ = 6635765632513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10532961007 + ... + 10532961636.

It is an arithmetic number, because the mean of its divisors is an integer number (547713988744).

Almost surely, 2^{6635765632545} is an apocalyptic number.

It is an amenable number.

6635765632545 is a deficient number, since it is larger than the sum of its proper divisors (6509370097311).

6635765632545 is a wasteful number, since it uses less digits than its factorization.

6635765632545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21065922661 (or 21065922658 counting only the distinct ones).

The product of its digits is 408240000, while the sum is 63.

The spelling of 6635765632545 in words is "six trillion, six hundred thirty-five billion, seven hundred sixty-five million, six hundred thirty-two thousand, five hundred forty-five".