858969742385 has 16 divisors (see below), whose sum is σ = 1101055240656. Its totient is φ = 641030197248.

The previous prime is 858969742373. The next prime is 858969742417. The reversal of 858969742385 is 583247969858.

It can be written as a sum of positive squares in 8 ways, for example, as 34300521616 + 824669220769 = 185204^2 + 908113^2 .

It is a cyclic number.

It is not a de Polignac number, because 858969742385 - 2⁶ = 858969742321 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44705114 + ... + 44724323.

It is an arithmetic number, because the mean of its divisors is an integer number (68815952541).

Almost surely, 2^858969742385 is an apocalyptic number.

858969742385 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

858969742385 is a deficient number, since it is larger than the sum of its proper divisors (242085498271).

858969742385 is a wasteful number, since it uses less digits than its factorization.

858969742385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89429572.

The product of its digits is 1045094400, while the sum is 74.

The spelling of 858969742385 in words is "eight hundred fifty-eight billion, nine hundred sixty-nine million, seven hundred forty-two thousand, three hundred eighty-five".