645158742833 has 16 divisors (see below), whose sum is σ = 743219160000. Its totient is φ = 553863847680.

The previous prime is 645158742803. The next prime is 645158742863. The reversal of 645158742833 is 338247851546.

645158742833 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (645158742803) and next prime (645158742863).

It is not a de Polignac number, because 645158742833 - 2⁸ = 645158742577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645158742803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4865708 + ... + 4996541.

It is an arithmetic number, because the mean of its divisors is an integer number (46451197500).

Almost surely, 2^645158742833 is an apocalyptic number.

It is an amenable number.

645158742833 is a deficient number, since it is larger than the sum of its proper divisors (98060417167).

645158742833 is a wasteful number, since it uses less digits than its factorization.

645158742833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9862592.

The product of its digits is 19353600, while the sum is 56.

The spelling of 645158742833 in words is "six hundred forty-five billion, one hundred fifty-eight million, seven hundred forty-two thousand, eight hundred thirty-three".