2261629845 has 12 divisors (see below), whose sum is σ = 3920158476. Its totient is φ = 1206202560.

The previous prime is 2261629841. The next prime is 2261629861. The reversal of 2261629845 is 5489261622.

2261629845 is a `hidden beast` number, since 2 + 2 + 616 + 29 + 8 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 720439281 + 1541190564 = 26841^2 + 39258^2 .

It is not a de Polignac number, because 2261629845 - 2² = 2261629841 is a prime.

It is a super-2 number, since 2×2261629845² = 10229939111589448050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 50258441 = 2261629845 / (2 + 2 + 6 + 1 + 6 + 2 + 9 + 8 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 2261629845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261629841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25129176 + ... + 25129265.

It is an arithmetic number, because the mean of its divisors is an integer number (326679873).

Almost surely, 2^2261629845 is an apocalyptic number.

It is an amenable number.

2261629845 is a deficient number, since it is larger than the sum of its proper divisors (1658528631).

2261629845 is a wasteful number, since it uses less digits than its factorization.

2261629845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50258452 (or 50258449 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 2261629845 is about 47556.5962301761. The cubic root of 2261629845 is about 1312.6245084604.

The spelling of 2261629845 in words is "two billion, two hundred sixty-one million, six hundred twenty-nine thousand, eight hundred forty-five".