815630827157 has 2 divisors, whose sum is σ = 815630827158. Its totient is φ = 815630827156.

The previous prime is 815630827147. The next prime is 815630827181. The reversal of 815630827157 is 751728036518.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 749252972836 + 66377854321 = 865594^2 + 257639^2 .

It is a cyclic number.

It is not a de Polignac number, because 815630827157 - 2¹² = 815630823061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 815630827099 and 815630827108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (815630827147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407815413578 + 407815413579.

It is an arithmetic number, because the mean of its divisors is an integer number (407815413579).

Almost surely, 2^815630827157 is an apocalyptic number.

It is an amenable number.

815630827157 is a deficient number, since it is larger than the sum of its proper divisors (1).

815630827157 is an equidigital number, since it uses as much as digits as its factorization.

815630827157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2822400, while the sum is 53.

The spelling of 815630827157 in words is "eight hundred fifteen billion, six hundred thirty million, eight hundred twenty-seven thousand, one hundred fifty-seven".