85658986381 has 4 divisors (see below), whose sum is σ = 85660588000. Its totient is φ = 85657384764.

The previous prime is 85658986363. The next prime is 85658986459. The reversal of 85658986381 is 18368985658.

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 an emirpimes, since its reverse is a distinct semiprime: 18368985658 = 2 ⋅9184492829.

It is a cyclic number.

It is not a de Polignac number, because 85658986381 - 2⁷ = 85658986253 is a prime.

It is a super-2 number, since 2×85658986381² (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 (85658986081) 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, 717711 + ... + 828508.

It is an arithmetic number, because the mean of its divisors is an integer number (21415147000).

Almost surely, 2^85658986381 is an apocalyptic number.

It is an amenable number.

85658986381 is a deficient number, since it is larger than the sum of its proper divisors (1601619).

85658986381 is a wasteful number, since it uses less digits than its factorization.

85658986381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601618.

The product of its digits is 99532800, while the sum is 67.

The spelling of 85658986381 in words is "eighty-five billion, six hundred fifty-eight million, nine hundred eighty-six thousand, three hundred eighty-one".