2265260781 has 16 divisors (see below), whose sum is σ = 3483497600. Its totient is φ = 1282557888.

The previous prime is 2265260771. The next prime is 2265260797. The reversal of 2265260781 is 1870625622.

It is not a de Polignac number, because 2265260781 - 2⁵ = 2265260749 is a prime.

It is a super-2 number, since 2×2265260781² = 10262812811873459922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2265260741) 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, 492526 + ... + 497103.

It is an arithmetic number, because the mean of its divisors is an integer number (217718600).

Almost surely, 2^2265260781 is an apocalyptic number.

2265260781 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2265260781 is a deficient number, since it is larger than the sum of its proper divisors (1218236819).

2265260781 is a wasteful number, since it uses less digits than its factorization.

2265260781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989748.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 2265260781 is about 47594.7558140600. The cubic root of 2265260781 is about 1313.3265843415.

The spelling of 2265260781 in words is "two billion, two hundred sixty-five million, two hundred sixty thousand, seven hundred eighty-one".