85051870381 has 4 divisors (see below), whose sum is σ = 85052481952. Its totient is φ = 85051258812.

The previous prime is 85051870369. The next prime is 85051870391. The reversal of 85051870381 is 18307815058.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85051870381 is a prime.

It is a super-2 number, since 2×85051870381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85051870331) 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, 14986 + ... + 412708.

It is an arithmetic number, because the mean of its divisors is an integer number (21263120488).

Almost surely, 2^85051870381 is an apocalyptic number.

It is an amenable number.

85051870381 is a deficient number, since it is larger than the sum of its proper divisors (611571).

85051870381 is a wasteful number, since it uses less digits than its factorization.

85051870381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611570.

The product of its (nonzero) digits is 268800, while the sum is 46.

The spelling of 85051870381 in words is "eighty-five billion, fifty-one million, eight hundred seventy thousand, three hundred eighty-one".