800261887877 has 4 divisors (see below), whose sum is σ = 827857125420. Its totient is φ = 772666650336.

The previous prime is 800261887847. The next prime is 800261887903. The reversal of 800261887877 is 778788162008.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 543384225316 + 256877662561 = 737146^2 + 506831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800261887877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800261887847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13797618728 + ... + 13797618785.

It is an arithmetic number, because the mean of its divisors is an integer number (206964281355).

Almost surely, 2^800261887877 is an apocalyptic number.

It is an amenable number.

800261887877 is a deficient number, since it is larger than the sum of its proper divisors (27595237543).

800261887877 is a wasteful number, since it uses less digits than its factorization.

800261887877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27595237542.

The product of its (nonzero) digits is 16859136, while the sum is 62.

The spelling of 800261887877 in words is "eight hundred billion, two hundred sixty-one million, eight hundred eighty-seven thousand, eight hundred seventy-seven".