628293894491 has 4 divisors (see below), whose sum is σ = 628314738072. Its totient is φ = 628273050912.

The previous prime is 628293894383. The next prime is 628293894493. The reversal of 628293894491 is 194498392826.

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

It is a cyclic number.

It is not a de Polignac number, because 628293894491 - 2²² = 628289700187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628293894493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10376510 + ... + 10436883.

It is an arithmetic number, because the mean of its divisors is an integer number (157078684518).

Almost surely, 2^628293894491 is an apocalyptic number.

628293894491 is a deficient number, since it is larger than the sum of its proper divisors (20843581).

628293894491 is a wasteful number, since it uses less digits than its factorization.

628293894491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20843580.

The product of its digits is 53747712, while the sum is 65.

The spelling of 628293894491 in words is "six hundred twenty-eight billion, two hundred ninety-three million, eight hundred ninety-four thousand, four hundred ninety-one".