6445753507545 has 24 divisors (see below), whose sum is σ = 11336002866048. Its totient is φ = 3125213820960.

The previous prime is 6445753507517. The next prime is 6445753507579. The reversal of 6445753507545 is 5457053575446.

It is not a de Polignac number, because 6445753507545 - 2¹¹ = 6445753505497 is a prime.

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, 1775687857 + ... + 1775691486.

It is an arithmetic number, because the mean of its divisors is an integer number (472333452752).

Almost surely, 2^{6445753507545} is an apocalyptic number.

It is an amenable number.

6445753507545 is a deficient number, since it is larger than the sum of its proper divisors (4890249358503).

6445753507545 is a wasteful number, since it uses less digits than its factorization.

6445753507545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3551379373 (or 3551379362 counting only the distinct ones).

The product of its (nonzero) digits is 176400000, while the sum is 60.

The spelling of 6445753507545 in words is "six trillion, four hundred forty-five billion, seven hundred fifty-three million, five hundred seven thousand, five hundred forty-five".