2877817861 has 2 divisors, whose sum is σ = 2877817862. Its totient is φ = 2877817860.

The previous prime is 2877817793. The next prime is 2877817883. The reversal of 2877817861 is 1687187782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2876176900 + 1640961 = 53630^2 + 1281^2 .

It is a cyclic number.

It is not a de Polignac number, because 2877817861 - 2¹⁷ = 2877686789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2877817361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1438908930 + 1438908931.

It is an arithmetic number, because the mean of its divisors is an integer number (1438908931).

Almost surely, 2^2877817861 is an apocalyptic number.

It is an amenable number.

2877817861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2877817861 is an equidigital number, since it uses as much as digits as its factorization.

2877817861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2107392, while the sum is 55.

The square root of 2877817861 is about 53645.2967276722. The cubic root of 2877817861 is about 1422.3978960219.

The spelling of 2877817861 in words is "two billion, eight hundred seventy-seven million, eight hundred seventeen thousand, eight hundred sixty-one".