11843845537861 has 2 divisors, whose sum is σ = 11843845537862. Its totient is φ = 11843845537860.

The previous prime is 11843845537817. The next prime is 11843845537877. The reversal of 11843845537861 is 16873554834811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11181199068900 + 662646468961 = 3343830^2 + 814031^2 .

It is a cyclic number.

It is not a de Polignac number, because 11843845537861 - 2²³ = 11843837149253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11843845537793 and 11843845537802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11843845537891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5921922768930 + 5921922768931.

It is an arithmetic number, because the mean of its divisors is an integer number (5921922768931).

Almost surely, 2^{11843845537861} is an apocalyptic number.

It is an amenable number.

11843845537861 is a deficient number, since it is larger than the sum of its proper divisors (1).

11843845537861 is an equidigital number, since it uses as much as digits as its factorization.

11843845537861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77414400, while the sum is 64.

The spelling of 11843845537861 in words is "eleven trillion, eight hundred forty-three billion, eight hundred forty-five million, five hundred thirty-seven thousand, eight hundred sixty-one".