815037506651 has 2 divisors, whose sum is σ = 815037506652. Its totient is φ = 815037506650.

The previous prime is 815037506627. The next prime is 815037506671. The reversal of 815037506651 is 156605730518.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-815037506651 is a prime.

It is a super-2 number, since 2×815037506651² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 815037506596 and 815037506605.

It is not a weakly prime, because it can be changed into another prime (815037506671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407518753325 + 407518753326.

It is an arithmetic number, because the mean of its divisors is an integer number (407518753326).

Almost surely, 2^815037506651 is an apocalyptic number.

815037506651 is a deficient number, since it is larger than the sum of its proper divisors (1).

815037506651 is an equidigital number, since it uses as much as digits as its factorization.

815037506651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756000, while the sum is 47.

The spelling of 815037506651 in words is "eight hundred fifteen billion, thirty-seven million, five hundred six thousand, six hundred fifty-one".