1949265865 has 8 divisors (see below), whose sum is σ = 2342661768. Its totient is φ = 1557050880.

The previous prime is 1949265863. The next prime is 1949265869. The reversal of 1949265865 is 5685629491.

It can be written as a sum of positive squares in 4 ways, for example, as 64577296 + 1884688569 = 8036^2 + 43413^2 .

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

It is not a de Polignac number, because 1949265865 - 2¹ = 1949265863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1949265863) 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, 291592 + ... + 298201.

It is an arithmetic number, because the mean of its divisors is an integer number (292832721).

Almost surely, 2^1949265865 is an apocalyptic number.

It is an amenable number.

1949265865 is a deficient number, since it is larger than the sum of its proper divisors (393395903).

1949265865 is an equidigital number, since it uses as much as digits as its factorization.

1949265865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590459.

The product of its digits is 4665600, while the sum is 55.

The square root of 1949265865 is about 44150.4911071213. The cubic root of 1949265865 is about 1249.1761750359.

The spelling of 1949265865 in words is "one billion, nine hundred forty-nine million, two hundred sixty-five thousand, eight hundred sixty-five".