850961408731 has 4 divisors (see below), whose sum is σ = 972527324272. Its totient is φ = 729395493192.

The previous prime is 850961408681. The next prime is 850961408767. The reversal of 850961408731 is 137804169058.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137804169058 = 2 ⋅68902084529.

It is a cyclic number.

It is not a de Polignac number, because 850961408731 - 2²³ = 850953020123 is a prime.

It is a super-2 number, since 2×850961408731² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (850961403731) 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, 60782957760 + ... + 60782957773.

It is an arithmetic number, because the mean of its divisors is an integer number (243131831068).

Almost surely, 2^850961408731 is an apocalyptic number.

850961408731 is a deficient number, since it is larger than the sum of its proper divisors (121565915541).

850961408731 is a wasteful number, since it uses less digits than its factorization.

850961408731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121565915540.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 850961408731 in words is "eight hundred fifty billion, nine hundred sixty-one million, four hundred eight thousand, seven hundred thirty-one".