628781354724 has 12 divisors (see below), whose sum is σ = 1467156494384. Its totient is φ = 209593784904.

The previous prime is 628781354711. The next prime is 628781354731. The reversal of 628781354724 is 427453187826.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26199223102 + ... + 26199223125.

Almost surely, 2^628781354724 is an apocalyptic number.

It is an amenable number.

628781354724 is an abundant number, since it is smaller than the sum of its proper divisors (838375139660).

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

628781354724 is a wasteful number, since it uses less digits than its factorization.

628781354724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52398446234 (or 52398446232 counting only the distinct ones).

The product of its digits is 18063360, while the sum is 57.

The spelling of 628781354724 in words is "six hundred twenty-eight billion, seven hundred eighty-one million, three hundred fifty-four thousand, seven hundred twenty-four".