2612436561 has 12 divisors (see below), whose sum is σ = 4312593792. Its totient is φ = 1492820856.

The previous prime is 2612436539. The next prime is 2612436571. The reversal of 2612436561 is 1656342162.

2612436561 is a `hidden beast` number, since 2 + 61 + 2 + 4 + 36 + 561 = 666.

It is not a de Polignac number, because 2612436561 - 2⁹ = 2612436049 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2612436571) 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, 20733561 + ... + 20733686.

It is an arithmetic number, because the mean of its divisors is an integer number (359382816).

Almost surely, 2^2612436561 is an apocalyptic number.

2612436561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2612436561 is a deficient number, since it is larger than the sum of its proper divisors (1700157231).

2612436561 is a wasteful number, since it uses less digits than its factorization.

2612436561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41467260 (or 41467257 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 2612436561 is about 51112.0001663015. Note that the first 3 decimals coincide. The cubic root of 2612436561 is about 1377.2578329082.

The spelling of 2612436561 in words is "two billion, six hundred twelve million, four hundred thirty-six thousand, five hundred sixty-one".