645270884460 has 36 divisors (see below), whose sum is σ = 1957321683408. Its totient is φ = 172072235808.

The previous prime is 645270884413. The next prime is 645270884471. The reversal of 645270884460 is 64488072546.

It is a happy number.

645270884460 is a `hidden beast` number, since 6 + 4 + 52 + 70 + 88 + 446 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 645270884397 and 645270884406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1792418944 + ... + 1792419303.

Almost surely, 2^645270884460 is an apocalyptic number.

645270884460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

645270884460 is an abundant number, since it is smaller than the sum of its proper divisors (1312050798948).

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

645270884460 is a wasteful number, since it uses less digits than its factorization.

645270884460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3584838262 (or 3584838257 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 54.

The spelling of 645270884460 in words is "six hundred forty-five billion, two hundred seventy million, eight hundred eighty-four thousand, four hundred sixty".