645228822546 has 96 divisors (see below), whose sum is σ = 1819569303360. Its totient is φ = 167591894400.

The previous prime is 645228822533. The next prime is 645228822643.

645228822546 is a `hidden beast` number, since 6 + 4 + 52 + 28 + 8 + 22 + 546 = 666.

645228822546 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 645228822492 and 645228822501.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11055015 + ... + 11113226.

It is an arithmetic number, because the mean of its divisors is an integer number (18953846910).

Almost surely, 2^645228822546 is an apocalyptic number.

645228822546 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

645228822546 is an abundant number, since it is smaller than the sum of its proper divisors (1174340480814).

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

645228822546 is a wasteful number, since it uses less digits than its factorization.

645228822546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22168277 (or 22168264 counting only the distinct ones).

The product of its digits is 14745600, while the sum is 54.

The spelling of 645228822546 in words is "six hundred forty-five billion, two hundred twenty-eight million, eight hundred twenty-two thousand, five hundred forty-six".