645435534546 has 64 divisors (see below), whose sum is σ = 1569789365760. Its totient is φ = 194949380880.

The previous prime is 645435534451. The next prime is 645435534553.

645435534546 is a `hidden beast` number, since 6 + 4 + 5 + 4 + 3 + 553 + 45 + 46 = 666.

645435534546 is nontrivially palindromic in base 10.

645435534546 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×645435534546² (a number of 24 digits) contains 22 as substring.

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 = 645435534492 and 645435534501.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1587336 + ... + 1952051.

It is an arithmetic number, because the mean of its divisors is an integer number (24527958840).

Almost surely, 2^645435534546 is an apocalyptic number.

645435534546 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

645435534546 is an abundant number, since it is smaller than the sum of its proper divisors (924353831214).

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

645435534546 is a wasteful number, since it uses less digits than its factorization.

645435534546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3539716 (or 3539710 counting only the distinct ones).

The product of its digits is 51840000, while the sum is 54.

The spelling of 645435534546 in words is "six hundred forty-five billion, four hundred thirty-five million, five hundred thirty-four thousand, five hundred forty-six".