6546445640 has 32 divisors (see below), whose sum is σ = 16833718080. Its totient is φ = 2244495552.

The previous prime is 6546445627. The next prime is 6546445643. The reversal of 6546445640 is 465446456.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6546445591 and 6546445600.

It is not an unprimeable number, because it can be changed into a prime (6546445643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11689802 + ... + 11690361.

It is an arithmetic number, because the mean of its divisors is an integer number (526053690).

Almost surely, 2^6546445640 is an apocalyptic number.

It is an amenable number.

6546445640 is an abundant number, since it is smaller than the sum of its proper divisors (10287272440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6546445640 is a wasteful number, since it uses less digits than its factorization.

6546445640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23380181 (or 23380177 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 44.

The square root of 6546445640 is about 80910.1083919679. The cubic root of 6546445640 is about 1870.6901319958.

The spelling of 6546445640 in words is "six billion, five hundred forty-six million, four hundred forty-five thousand, six hundred forty".