6535971509445 has 24 divisors (see below), whose sum is σ = 12947448324096. Its totient is φ = 2987872689888.

The previous prime is 6535971509413. The next prime is 6535971509467. The reversal of 6535971509445 is 5449051795356.

6535971509445 is a `hidden beast` number, since 6 + 5 + 3 + 59 + 71 + 509 + 4 + 4 + 5 = 666.

It is not a de Polignac number, because 6535971509445 - 2⁵ = 6535971509413 is a prime.

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

It is a congruent number.

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, 10374557637 + ... + 10374558266.

It is an arithmetic number, because the mean of its divisors is an integer number (539477013504).

Almost surely, 2^{6535971509445} is an apocalyptic number.

It is an amenable number.

6535971509445 is a deficient number, since it is larger than the sum of its proper divisors (6411476814651).

6535971509445 is a wasteful number, since it uses less digits than its factorization.

6535971509445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20749115921 (or 20749115918 counting only the distinct ones).

The product of its (nonzero) digits is 102060000, while the sum is 63.

The spelling of 6535971509445 in words is "six trillion, five hundred thirty-five billion, nine hundred seventy-one million, five hundred nine thousand, four hundred forty-five".