851034237861 has 8 divisors (see below), whose sum is σ = 1134716664064. Its totient is φ = 567353985120.

The previous prime is 851034237853. The next prime is 851034237919. The reversal of 851034237861 is 168732430158.

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

It is not a de Polignac number, because 851034237861 - 2³ = 851034237853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 851034237861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851034237061) 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, 981996 + ... + 1632906.

It is an arithmetic number, because the mean of its divisors is an integer number (141839583008).

Almost surely, 2^851034237861 is an apocalyptic number.

It is an amenable number.

851034237861 is a deficient number, since it is larger than the sum of its proper divisors (283682426203).

851034237861 is a wasteful number, since it uses less digits than its factorization.

851034237861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086731.

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 851034237861 in words is "eight hundred fifty-one billion, thirty-four million, two hundred thirty-seven thousand, eight hundred sixty-one".