2261275664 has 10 divisors (see below), whose sum is σ = 4381221630. Its totient is φ = 1130637824.

The previous prime is 2261275649. The next prime is 2261275669. The reversal of 2261275664 is 4665721622.

It can be written as a sum of positive squares in only one way, i.e., 1671174400 + 590101264 = 40880^2 + 24292^2 .

It is a super-2 number, since 2×2261275664² = 10226735257197281792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2261275669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70664849 + ... + 70664880.

It is an arithmetic number, because the mean of its divisors is an integer number (438122163).

Almost surely, 2^2261275664 is an apocalyptic number.

It is an amenable number.

2261275664 is a deficient number, since it is larger than the sum of its proper divisors (2119945966).

2261275664 is a wasteful number, since it uses less digits than its factorization.

2261275664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141329737 (or 141329731 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 2261275664 is about 47552.8723002092. The cubic root of 2261275664 is about 1312.5559839945. Note that the first 3 decimals are identical.

The spelling of 2261275664 in words is "two billion, two hundred sixty-one million, two hundred seventy-five thousand, six hundred sixty-four".