2161061403287 has 2 divisors, whose sum is σ = 2161061403288. Its totient is φ = 2161061403286.

The previous prime is 2161061403251. The next prime is 2161061403349. The reversal of 2161061403287 is 7823041601612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2161061403287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161061403227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080530701643 + 1080530701644.

It is an arithmetic number, because the mean of its divisors is an integer number (1080530701644).

Almost surely, 2^{2161061403287} is an apocalyptic number.

2161061403287 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161061403287 is an equidigital number, since it uses as much as digits as its factorization.

2161061403287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 2161061403287 in words is "two trillion, one hundred sixty-one billion, sixty-one million, four hundred three thousand, two hundred eighty-seven".