856239254701 has 32 divisors (see below), whose sum is σ = 917987406336. Its totient is φ = 797375040000.

The previous prime is 856239254699. The next prime is 856239254749. The reversal of 856239254701 is 107452932658.

It is a cyclic number.

It is not a de Polignac number, because 856239254701 - 2¹ = 856239254699 is a prime.

It is a super-2 number, since 2×856239254701² (a number of 25 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 (856239255701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58078191 + ... + 58092931.

It is an arithmetic number, because the mean of its divisors is an integer number (28687106448).

It is a 1-persistent number, because it is pandigital, but 2⋅856239254701 = 1712478509402 is not.

Almost surely, 2^856239254701 is an apocalyptic number.

It is an amenable number.

856239254701 is a deficient number, since it is larger than the sum of its proper divisors (61748151635).

856239254701 is a wasteful number, since it uses less digits than its factorization.

856239254701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15573.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 856239254701 in words is "eight hundred fifty-six billion, two hundred thirty-nine million, two hundred fifty-four thousand, seven hundred one".