851597795157 has 4 divisors (see below), whose sum is σ = 1135463726880. Its totient is φ = 567731863436.

The previous prime is 851597795029. The next prime is 851597795159. The reversal of 851597795157 is 751597795158.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 851597795157 - 2⁷ = 851597795029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 851597795091 and 851597795100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851597795159) 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, 141932965857 + ... + 141932965862.

It is an arithmetic number, because the mean of its divisors is an integer number (283865931720).

Almost surely, 2^851597795157 is an apocalyptic number.

It is an amenable number.

851597795157 is a deficient number, since it is larger than the sum of its proper divisors (283865931723).

851597795157 is a wasteful number, since it uses less digits than its factorization.

851597795157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283865931722.

The product of its digits is 138915000, while the sum is 69.

Subtracting from 851597795157 its reverse (751597795158), we obtain a palindrome (99999999999).

The spelling of 851597795157 in words is "eight hundred fifty-one billion, five hundred ninety-seven million, seven hundred ninety-five thousand, one hundred fifty-seven".