861538095 has 24 divisors (see below), whose sum is σ = 1629091152. Its totient is φ = 417715200.

The previous prime is 861538049. The next prime is 861538123. The reversal of 861538095 is 590835168.

It is not a de Polignac number, because 861538095 - 2⁶ = 861538031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 861538095.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 869746 + ... + 870735.

It is an arithmetic number, because the mean of its divisors is an integer number (67878798).

Almost surely, 2^861538095 is an apocalyptic number.

861538095 is a deficient number, since it is larger than the sum of its proper divisors (767553057).

861538095 is a wasteful number, since it uses less digits than its factorization.

861538095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740503 (or 1740500 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 861538095 is about 29351.9691843665. The cubic root of 861538095 is about 951.5351338761.

The spelling of 861538095 in words is "eight hundred sixty-one million, five hundred thirty-eight thousand, ninety-five".