740164561 has 4 divisors (see below), whose sum is σ = 740232000. Its totient is φ = 740097124.

The previous prime is 740164553. The next prime is 740164573. The reversal of 740164561 is 165461047.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 740164561 - 2³ = 740164553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (740164501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13021 + ... + 40618.

It is an arithmetic number, because the mean of its divisors is an integer number (185058000).

Almost surely, 2^740164561 is an apocalyptic number.

It is an amenable number.

740164561 is a deficient number, since it is larger than the sum of its proper divisors (67439).

740164561 is a wasteful number, since it uses less digits than its factorization.

740164561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67438.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 740164561 is about 27205.9655406677. The cubic root of 740164561 is about 904.5712124792.

The spelling of 740164561 in words is "seven hundred forty million, one hundred sixty-four thousand, five hundred sixty-one".