745289340321 has 16 divisors (see below), whose sum is σ = 999226441728. Its totient is φ = 494107486800.

The previous prime is 745289340319. The next prime is 745289340371. The reversal of 745289340321 is 123043982547.

745289340321 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 745289340321 - 2¹ = 745289340319 is a prime.

It is a super-2 number, since 2×745289340321² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (745289340371) 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, 1698256 + ... + 2091566.

It is an arithmetic number, because the mean of its divisors is an integer number (62451652608).

Almost surely, 2^745289340321 is an apocalyptic number.

It is an amenable number.

745289340321 is a deficient number, since it is larger than the sum of its proper divisors (253937101407).

745289340321 is a wasteful number, since it uses less digits than its factorization.

745289340321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396812.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 745289340321 in words is "seven hundred forty-five billion, two hundred eighty-nine million, three hundred forty thousand, three hundred twenty-one".