745926161 has 4 divisors (see below), whose sum is σ = 764119524. Its totient is φ = 727732800.

The previous prime is 745926157. The next prime is 745926173. The reversal of 745926161 is 161629547.

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 286252561 + 459673600 = 16919^2 + 21440^2 .

It is a cyclic number.

It is not a de Polignac number, because 745926161 - 2² = 745926157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 18193321 = 745926161 / (7 + 4 + 5 + 9 + 2 + 6 + 1 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745926101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9096620 + ... + 9096701.

It is an arithmetic number, because the mean of its divisors is an integer number (191029881).

Almost surely, 2^745926161 is an apocalyptic number.

It is an amenable number.

745926161 is a deficient number, since it is larger than the sum of its proper divisors (18193363).

745926161 is a wasteful number, since it uses less digits than its factorization.

745926161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18193362.

The product of its digits is 90720, while the sum is 41.

The square root of 745926161 is about 27311.6488151118. The cubic root of 745926161 is about 906.9122740725.

The spelling of 745926161 in words is "seven hundred forty-five million, nine hundred twenty-six thousand, one hundred sixty-one".