745161239809 has 24 divisors (see below), whose sum is σ = 874976493600. Its totient is φ = 632716943040.

The previous prime is 745161239701. The next prime is 745161239833. The reversal of 745161239809 is 908932161547.

It is a happy number.

It is not a de Polignac number, because 745161239809 - 2¹⁹ = 745160715521 is a prime.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 745161239809.

It is not an unprimeable number, because it can be changed into a prime (745161239839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3550402 + ... + 3754420.

It is an arithmetic number, because the mean of its divisors is an integer number (36457353900).

It is a 1-persistent number, because it is pandigital, but 2⋅745161239809 = 1490322479618 is not.

Almost surely, 2^745161239809 is an apocalyptic number.

It is an amenable number.

745161239809 is a deficient number, since it is larger than the sum of its proper divisors (129815253791).

745161239809 is a wasteful number, since it uses less digits than its factorization.

745161239809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204733 (or 204726 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 745161239809 in words is "seven hundred forty-five billion, one hundred sixty-one million, two hundred thirty-nine thousand, eight hundred nine".