645302858554 has 4 divisors (see below), whose sum is σ = 967954287834. Its totient is φ = 322651429276.

The previous prime is 645302858537. The next prime is 645302858569. The reversal of 645302858554 is 455858203546.

645302858554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 402177930625 + 243124927929 = 634175^2 + 493077^2 .

It is a junction number, because it is equal to n+sod(n) for n = 645302858495 and 645302858504.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161325714637 + ... + 161325714640.

Almost surely, 2^645302858554 is an apocalyptic number.

645302858554 is a deficient number, since it is larger than the sum of its proper divisors (322651429280).

645302858554 is a wasteful number, since it uses less digits than its factorization.

645302858554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322651429279.

The product of its (nonzero) digits is 23040000, while the sum is 55.

The spelling of 645302858554 in words is "six hundred forty-five billion, three hundred two million, eight hundred fifty-eight thousand, five hundred fifty-four".