745390213921 has 8 divisors (see below), whose sum is σ = 755026320384. Its totient is φ = 735769714800.

The previous prime is 745390213913. The next prime is 745390213937. The reversal of 745390213921 is 129312093547.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 745390213921 - 2³ = 745390213913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745390213951) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3805686 + ... + 3996751.

It is an arithmetic number, because the mean of its divisors is an integer number (94378290048).

Almost surely, 2^745390213921 is an apocalyptic number.

It is an amenable number.

745390213921 is a deficient number, since it is larger than the sum of its proper divisors (9636106463).

745390213921 is a wasteful number, since it uses less digits than its factorization.

745390213921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7803671.

The product of its (nonzero) digits is 408240, while the sum is 46.

The spelling of 745390213921 in words is "seven hundred forty-five billion, three hundred ninety million, two hundred thirteen thousand, nine hundred twenty-one".