11555204865731 has 2 divisors, whose sum is σ = 11555204865732. Its totient is φ = 11555204865730.

The previous prime is 11555204865727. The next prime is 11555204865847. The reversal of 11555204865731 is 13756840255511.

11555204865731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11555204865731 - 2² = 11555204865727 is a prime.

It is a super-2 number, since 2×11555204865731² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11555204865331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5777602432865 + 5777602432866.

It is an arithmetic number, because the mean of its divisors is an integer number (5777602432866).

Almost surely, 2^{11555204865731} is an apocalyptic number.

11555204865731 is a deficient number, since it is larger than the sum of its proper divisors (1).

11555204865731 is an equidigital number, since it uses as much as digits as its factorization.

11555204865731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040000, while the sum is 53.

The spelling of 11555204865731 in words is "eleven trillion, five hundred fifty-five billion, two hundred four million, eight hundred sixty-five thousand, seven hundred thirty-one".