10911978415837 has 2 divisors, whose sum is σ = 10911978415838. Its totient is φ = 10911978415836.

The previous prime is 10911978415817. The next prime is 10911978415883. The reversal of 10911978415837 is 73851487911901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8994276910116 + 1917701505721 = 2999046^2 + 1384811^2 .

It is a cyclic number.

It is not a de Polignac number, because 10911978415837 - 2³⁵ = 10877618677469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10911978415817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5455989207918 + 5455989207919.

It is an arithmetic number, because the mean of its divisors is an integer number (5455989207919).

Almost surely, 2^{10911978415837} is an apocalyptic number.

It is an amenable number.

10911978415837 is a deficient number, since it is larger than the sum of its proper divisors (1).

10911978415837 is an equidigital number, since it uses as much as digits as its factorization.

10911978415837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15240960, while the sum is 64.

The spelling of 10911978415837 in words is "ten trillion, nine hundred eleven billion, nine hundred seventy-eight million, four hundred fifteen thousand, eight hundred thirty-seven".