2361555261 has 12 divisors (see below), whose sum is σ = 3673530588. Its totient is φ = 1453264704.

The previous prime is 2361555257. The next prime is 2361555311. The reversal of 2361555261 is 1625551632.

2361555261 is a `hidden beast` number, since 2 + 36 + 15 + 552 + 61 = 666.

2361555261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 899640036 + 1461915225 = 29994^2 + 38235^2 .

It is not a de Polignac number, because 2361555261 - 2² = 2361555257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2361555241) 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, 10092000 + ... + 10092233.

It is an arithmetic number, because the mean of its divisors is an integer number (306127549).

Almost surely, 2^2361555261 is an apocalyptic number.

It is an amenable number.

2361555261 is a deficient number, since it is larger than the sum of its proper divisors (1311975327).

2361555261 is a wasteful number, since it uses less digits than its factorization.

2361555261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20184252 (or 20184249 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 2361555261 is about 48595.8358401211. The cubic root of 2361555261 is about 1331.6784471901.

The spelling of 2361555261 in words is "two billion, three hundred sixty-one million, five hundred fifty-five thousand, two hundred sixty-one".