861771151 has 8 divisors (see below), whose sum is σ = 869180400. Its totient is φ = 854383872.

The previous prime is 861771137. The next prime is 861771161. The reversal of 861771151 is 151177168.

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 861771151 - 2⁷ = 861771023 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 861771151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861771161) 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, 78751 + ... + 89023.

It is an arithmetic number, because the mean of its divisors is an integer number (108647550).

Almost surely, 2^861771151 is an apocalyptic number.

861771151 is a deficient number, since it is larger than the sum of its proper divisors (7409249).

861771151 is a wasteful number, since it uses less digits than its factorization.

861771151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10985.

The product of its digits is 11760, while the sum is 37.

The square root of 861771151 is about 29355.9389391653. The cubic root of 861771151 is about 951.6209265533.

The spelling of 861771151 in words is "eight hundred sixty-one million, seven hundred seventy-one thousand, one hundred fifty-one".