6645032345511 has 32 divisors (see below), whose sum is σ = 11251898155520. Its totient is φ = 3796807053312.

The previous prime is 6645032345467. The next prime is 6645032345521. The reversal of 6645032345511 is 1155432305466.

It is a happy number.

6645032345511 is a `hidden beast` number, since 6 + 64 + 5 + 0 + 3 + 2 + 34 + 551 + 1 = 666.

It is not a de Polignac number, because 6645032345511 - 2²² = 6645028151207 is a prime.

It is a super-2 number, since 2×6645032345511² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645032345521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 397476 + ... + 3667158.

It is an arithmetic number, because the mean of its divisors is an integer number (351621817360).

Almost surely, 2^{6645032345511} is an apocalyptic number.

6645032345511 is a deficient number, since it is larger than the sum of its proper divisors (4606865810009).

6645032345511 is a wasteful number, since it uses less digits than its factorization.

6645032345511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280452 (or 3280446 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 6645032345511 in words is "six trillion, six hundred forty-five billion, thirty-two million, three hundred forty-five thousand, five hundred eleven".