8261195541787 has 2 divisors, whose sum is σ = 8261195541788. Its totient is φ = 8261195541786.

The previous prime is 8261195541743. The next prime is 8261195541917. The reversal of 8261195541787 is 7871455911628.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8261195541787 - 2¹⁵ = 8261195509019 is a prime.

It is not a weakly prime, because it can be changed into another prime (8261195541187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4130597770893 + 4130597770894.

It is an arithmetic number, because the mean of its divisors is an integer number (4130597770894).

Almost surely, 2^{8261195541787} is an apocalyptic number.

8261195541787 is a deficient number, since it is larger than the sum of its proper divisors (1).

8261195541787 is an equidigital number, since it uses as much as digits as its factorization.

8261195541787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33868800, while the sum is 64.

The spelling of 8261195541787 in words is "eight trillion, two hundred sixty-one billion, one hundred ninety-five million, five hundred forty-one thousand, seven hundred eighty-seven".