85278337381 has 4 divisors (see below), whose sum is σ = 85316359392. Its totient is φ = 85240315372.

The previous prime is 85278337363. The next prime is 85278337399. The reversal of 85278337381 is 18373387258.

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.

It is an interprime number because it is at equal distance from previous prime (85278337363) and next prime (85278337399).

It is a cyclic number.

It is not a de Polignac number, because 85278337381 - 2²³ = 85269948773 is a prime.

It is a super-2 number, since 2×85278337381² (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 (85278337681) 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, 19007641 + ... + 19012126.

It is an arithmetic number, because the mean of its divisors is an integer number (21329089848).

Almost surely, 2^85278337381 is an apocalyptic number.

It is an amenable number.

85278337381 is a deficient number, since it is larger than the sum of its proper divisors (38022011).

85278337381 is a wasteful number, since it uses less digits than its factorization.

85278337381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38022010.

The product of its digits is 6773760, while the sum is 55.

The spelling of 85278337381 in words is "eighty-five billion, two hundred seventy-eight million, three hundred thirty-seven thousand, three hundred eighty-one".