861552877 has 8 divisors (see below), whose sum is σ = 912646656. Its totient is φ = 810505152.

The previous prime is 861552863. The next prime is 861552893. The reversal of 861552877 is 778255168.

861552877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 861552877 - 2¹⁵ = 861520109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 861552877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861552847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31668 + ... + 52210.

It is an arithmetic number, because the mean of its divisors is an integer number (114080832).

Almost surely, 2^861552877 is an apocalyptic number.

It is an amenable number.

861552877 is a deficient number, since it is larger than the sum of its proper divisors (51093779).

861552877 is a wasteful number, since it uses less digits than its factorization.

861552877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23027.

The product of its digits is 940800, while the sum is 49.

The square root of 861552877 is about 29352.2209892199. The cubic root of 861552877 is about 951.5405758920.

The spelling of 861552877 in words is "eight hundred sixty-one million, five hundred fifty-two thousand, eight hundred seventy-seven".