2261527878 has 8 divisors (see below), whose sum is σ = 4523055768. Its totient is φ = 753842624.

The previous prime is 2261527871. The next prime is 2261527907. The reversal of 2261527878 is 8787251622.

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

2261527878 is an admirable number.

It is a super-2 number, since 2×2261527878² = 10229016685942365768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261527871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188460651 + ... + 188460662.

It is an arithmetic number, because the mean of its divisors is an integer number (565381971).

Almost surely, 2^2261527878 is an apocalyptic number.

2261527878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2261527878 is a wasteful number, since it uses less digits than its factorization.

2261527878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376921318.

The product of its digits is 752640, while the sum is 48.

The square root of 2261527878 is about 47555.5241586085. The cubic root of 2261527878 is about 1312.6047813309.

The spelling of 2261527878 in words is "two billion, two hundred sixty-one million, five hundred twenty-seven thousand, eight hundred seventy-eight".