8861781157277 has 2 divisors, whose sum is σ = 8861781157278. Its totient is φ = 8861781157276.

The previous prime is 8861781157241. The next prime is 8861781157297. The reversal of 8861781157277 is 7727511871688.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8404235788036 + 457545369241 = 2899006^2 + 676421^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8861781157277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8861781157217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4430890578638 + 4430890578639.

It is an arithmetic number, because the mean of its divisors is an integer number (4430890578639).

Almost surely, 2^{8861781157277} is an apocalyptic number.

It is an amenable number.

8861781157277 is a deficient number, since it is larger than the sum of its proper divisors (1).

8861781157277 is an equidigital number, since it uses as much as digits as its factorization.

8861781157277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73758720, while the sum is 68.

The spelling of 8861781157277 in words is "eight trillion, eight hundred sixty-one billion, seven hundred eighty-one million, one hundred fifty-seven thousand, two hundred seventy-seven".