645562265546 has 16 divisors (see below), whose sum is σ = 1058666118048. Its totient is φ = 292800865200.

The previous prime is 645562265527. The next prime is 645562265561.

645562265546 is nontrivially palindromic in base 10.

645562265546 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 645562265491 and 645562265500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31816040 + ... + 31836323.

It is an arithmetic number, because the mean of its divisors is an integer number (66166632378).

Almost surely, 2^645562265546 is an apocalyptic number.

645562265546 is a deficient number, since it is larger than the sum of its proper divisors (413103852502).

645562265546 is a wasteful number, since it uses less digits than its factorization.

645562265546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63652837.

The product of its digits is 51840000, while the sum is 56.

The spelling of 645562265546 in words is "six hundred forty-five billion, five hundred sixty-two million, two hundred sixty-five thousand, five hundred forty-six".