85388331557 has 8 divisors (see below), whose sum is σ = 86449976256. Its totient is φ = 84327469632.

The previous prime is 85388331551. The next prime is 85388331559. The reversal of 85388331557 is 75513388358.

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

It is a cyclic number.

It is not a de Polignac number, because 85388331557 - 2¹² = 85388327461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85388331551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25373 + ... + 414029.

It is an arithmetic number, because the mean of its divisors is an integer number (10806247032).

Almost surely, 2^85388331557 is an apocalyptic number.

It is an amenable number.

85388331557 is a deficient number, since it is larger than the sum of its proper divisors (1061644699).

85388331557 is a wasteful number, since it uses less digits than its factorization.

85388331557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391387.

The product of its digits is 12096000, while the sum is 56.

The spelling of 85388331557 in words is "eighty-five billion, three hundred eighty-eight million, three hundred thirty-one thousand, five hundred fifty-seven".