2861997514091 has 2 divisors, whose sum is σ = 2861997514092. Its totient is φ = 2861997514090.

The previous prime is 2861997514081. The next prime is 2861997514139. The reversal of 2861997514091 is 1904157991682.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2861997514091 - 2⁶ = 2861997514027 is a prime.

It is not a weakly prime, because it can be changed into another prime (2861997514081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1430998757045 + 1430998757046.

It is an arithmetic number, because the mean of its divisors is an integer number (1430998757046).

Almost surely, 2^{2861997514091} is an apocalyptic number.

2861997514091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2861997514091 is an equidigital number, since it uses as much as digits as its factorization.

2861997514091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 62.

The spelling of 2861997514091 in words is "two trillion, eight hundred sixty-one billion, nine hundred ninety-seven million, five hundred fourteen thousand, ninety-one".