815451489310001 has 2 divisors, whose sum is σ = 815451489310002. Its totient is φ = 815451489310000.

The previous prime is 815451489309991. The next prime is 815451489310019. The reversal of 815451489310001 is 100013984154518.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 693436158246976 + 122015331063025 = 26333176^2 + 11046055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-815451489310001 is a prime.

It is a super-2 number, since 2×815451489310001² (a number of 31 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (815451089310001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407725744655000 + 407725744655001.

It is an arithmetic number, because the mean of its divisors is an integer number (407725744655001).

Almost surely, 2^{815451489310001} is an apocalyptic number.

It is an amenable number.

815451489310001 is a deficient number, since it is larger than the sum of its proper divisors (1).

815451489310001 is an equidigital number, since it uses as much as digits as its factorization.

815451489310001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 50.

The spelling of 815451489310001 in words is "eight hundred fifteen trillion, four hundred fifty-one billion, four hundred eighty-nine million, three hundred ten thousand, one".