260505575749 has 16 divisors (see below), whose sum is σ = 283501341360. Its totient is φ = 238452572160.

The previous prime is 260505575713. The next prime is 260505575777. The reversal of 260505575749 is 947575505062.

It can be written as a sum of positive squares in 8 ways, for example, as 45121406724 + 215384169025 = 212418^2 + 464095^2 .

It is not a de Polignac number, because 260505575749 - 2¹⁵ = 260505542981 is a prime.

It is a super-2 number, since 2×260505575749² (a number of 24 digits) contains 22 as substring.

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 260505575749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260505575149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1319004 + ... + 1503589.

It is an arithmetic number, because the mean of its divisors is an integer number (17718833835).

Almost surely, 2^260505575749 is an apocalyptic number.

It is an amenable number.

260505575749 is a deficient number, since it is larger than the sum of its proper divisors (22995765611).

260505575749 is a wasteful number, since it uses less digits than its factorization.

260505575749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2822760.

The product of its (nonzero) digits is 13230000, while the sum is 55.

The spelling of 260505575749 in words is "two hundred sixty billion, five hundred five million, five hundred seventy-five thousand, seven hundred forty-nine".