2691312880787 has 2 divisors, whose sum is σ = 2691312880788. Its totient is φ = 2691312880786.

The previous prime is 2691312880733. The next prime is 2691312880877. The reversal of 2691312880787 is 7870882131962.

Together with next prime (2691312880877) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2691312880787 - 2¹⁶ = 2691312815251 is a prime.

It is not a weakly prime, because it can be changed into another prime (2691312880687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345656440393 + 1345656440394.

It is an arithmetic number, because the mean of its divisors is an integer number (1345656440394).

Almost surely, 2^{2691312880787} is an apocalyptic number.

2691312880787 is a deficient number, since it is larger than the sum of its proper divisors (1).

2691312880787 is an equidigital number, since it uses as much as digits as its factorization.

2691312880787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16257024, while the sum is 62.

The spelling of 2691312880787 in words is "two trillion, six hundred ninety-one billion, three hundred twelve million, eight hundred eighty thousand, seven hundred eighty-seven".