561377265 has 8 divisors (see below), whose sum is σ = 898203648. Its totient is φ = 299401200.

The previous prime is 561377263. The next prime is 561377279. The reversal of 561377265 is 562773165.

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

It is not a de Polignac number, because 561377265 - 2¹ = 561377263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561377263) 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 7 ways as a sum of consecutive naturals, for example, 18712561 + ... + 18712590.

It is an arithmetic number, because the mean of its divisors is an integer number (112275456).

Almost surely, 2^561377265 is an apocalyptic number.

It is an amenable number.

561377265 is a deficient number, since it is larger than the sum of its proper divisors (336826383).

561377265 is a wasteful number, since it uses less digits than its factorization.

561377265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37425159.

The product of its digits is 264600, while the sum is 42.

The square root of 561377265 is about 23693.4012965636. The cubic root of 561377265 is about 824.9322331848.

The spelling of 561377265 in words is "five hundred sixty-one million, three hundred seventy-seven thousand, two hundred sixty-five".