2261333520778 has 8 divisors (see below), whose sum is σ = 3470884008768. Its totient is φ = 1104372184524.

The previous prime is 2261333520707. The next prime is 2261333520779. The reversal of 2261333520778 is 8770253331622.

It is a happy number.

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

It is a super-2 number, since 2×2261333520778² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2261333520779) 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 3 ways as a sum of consecutive naturals, for example, 13147287826 + ... + 13147287997.

It is an arithmetic number, because the mean of its divisors is an integer number (433860501096).

Almost surely, 2^{2261333520778} is an apocalyptic number.

2261333520778 is a deficient number, since it is larger than the sum of its proper divisors (1209550487990).

2261333520778 is a wasteful number, since it uses less digits than its factorization.

2261333520778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26294575868.

The product of its (nonzero) digits is 2540160, while the sum is 49.

The spelling of 2261333520778 in words is "two trillion, two hundred sixty-one billion, three hundred thirty-three million, five hundred twenty thousand, seven hundred seventy-eight".