746627681389 has 4 divisors (see below), whose sum is σ = 746630349724. Its totient is φ = 746625013056.

The previous prime is 746627681377. The next prime is 746627681431. The reversal of 746627681389 is 983186726647.

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

It can be written as a sum of positive squares in 2 ways, for example, as 84126102025 + 662501579364 = 290045^2 + 813942^2 .

It is a cyclic number.

It is not a de Polignac number, because 746627681389 - 2⁵ = 746627681357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (746627681689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 857742 + ... + 1492975.

It is an arithmetic number, because the mean of its divisors is an integer number (186657587431).

Almost surely, 2^746627681389 is an apocalyptic number.

It is an amenable number.

746627681389 is a deficient number, since it is larger than the sum of its proper divisors (2668335).

746627681389 is a wasteful number, since it uses less digits than its factorization.

746627681389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2668334.

The product of its digits is 146313216, while the sum is 67.

The spelling of 746627681389 in words is "seven hundred forty-six billion, six hundred twenty-seven million, six hundred eighty-one thousand, three hundred eighty-nine".