85761824138 has 8 divisors (see below), whose sum is σ = 128700249732. Its totient is φ = 42861740896.

The previous prime is 85761824131. The next prime is 85761824153. The reversal of 85761824138 is 83142816758.

It can be written as a sum of positive squares in 2 ways, for example, as 84880743649 + 881080489 = 291343^2 + 29683^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 85761824138.

It is not an unprimeable number, because it can be changed into a prime (85761824131) 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, 9579995 + ... + 9588942.

Almost surely, 2^85761824138 is an apocalyptic number.

85761824138 is a deficient number, since it is larger than the sum of its proper divisors (42938425594).

85761824138 is a wasteful number, since it uses less digits than its factorization.

85761824138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19171176.

The product of its digits is 2580480, while the sum is 53.

The spelling of 85761824138 in words is "eighty-five billion, seven hundred sixty-one million, eight hundred twenty-four thousand, one hundred thirty-eight".