645611415546 has 16 divisors (see below), whose sum is σ = 1291259289600. Its totient is φ = 215197728768.

The previous prime is 645611415541. The next prime is 645611415563. The reversal of 645611415546 is 645514116546.

It is a junction number, because it is equal to n+sod(n) for n = 645611415495 and 645611415504.

It is not an unprimeable number, because it can be changed into a prime (645611415541) 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, 1286151 + ... + 1716218.

It is an arithmetic number, because the mean of its divisors is an integer number (80703705600).

Almost surely, 2^645611415546 is an apocalyptic number.

645611415546 is an abundant number, since it is smaller than the sum of its proper divisors (645647874054).

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

645611415546 is a wasteful number, since it uses less digits than its factorization.

645611415546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3038213.

The product of its digits is 1728000, while the sum is 48.

The spelling of 645611415546 in words is "six hundred forty-five billion, six hundred eleven million, four hundred fifteen thousand, five hundred forty-six".