6545021431631 has 16 divisors (see below), whose sum is σ = 6809805001728. Its totient is φ = 6283650187200.

The previous prime is 6545021431607. The next prime is 6545021431633. The reversal of 6545021431631 is 1361341205456.

It is a cyclic number.

It is not a de Polignac number, because 6545021431631 - 2⁶ = 6545021431567 is a prime.

It is a super-2 number, since 2×6545021431631² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6545021431633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6181556 + ... + 7162518.

It is an arithmetic number, because the mean of its divisors is an integer number (425612812608).

Almost surely, 2^{6545021431631} is an apocalyptic number.

6545021431631 is a deficient number, since it is larger than the sum of its proper divisors (264783570097).

6545021431631 is a wasteful number, since it uses less digits than its factorization.

6545021431631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982702.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 6545021431631 in words is "six trillion, five hundred forty-five billion, twenty-one million, four hundred thirty-one thousand, six hundred thirty-one".