6406535420531 has 4 divisors (see below), whose sum is σ = 6406549747200. Its totient is φ = 6406521093864.

The previous prime is 6406535420507. The next prime is 6406535420599. The reversal of 6406535420531 is 1350245356046.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6406535420531 is a prime.

It is a super-2 number, since 2×6406535420531² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6406535420501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6470216 + ... + 7394373.

It is an arithmetic number, because the mean of its divisors is an integer number (1601637436800).

Almost surely, 2^{6406535420531} is an apocalyptic number.

6406535420531 is a deficient number, since it is larger than the sum of its proper divisors (14326669).

6406535420531 is a wasteful number, since it uses less digits than its factorization.

6406535420531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14326668.

The product of its (nonzero) digits is 1296000, while the sum is 44.

The spelling of 6406535420531 in words is "six trillion, four hundred six billion, five hundred thirty-five million, four hundred twenty thousand, five hundred thirty-one".