745188621 has 16 divisors (see below), whose sum is σ = 1027907904. Its totient is φ = 479827584.

The previous prime is 745188617. The next prime is 745188641. The reversal of 745188621 is 126881547.

745188621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 745188621 - 2² = 745188617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745188641) 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, 9295 + ... + 39708.

It is an arithmetic number, because the mean of its divisors is an integer number (64244244).

Almost surely, 2^745188621 is an apocalyptic number.

It is an amenable number.

745188621 is a deficient number, since it is larger than the sum of its proper divisors (282719283).

745188621 is a wasteful number, since it uses less digits than its factorization.

745188621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49180.

The product of its digits is 107520, while the sum is 42.

The square root of 745188621 is about 27298.1431786120. The cubic root of 745188621 is about 906.6132701006.

The spelling of 745188621 in words is "seven hundred forty-five million, one hundred eighty-eight thousand, six hundred twenty-one".