2515666325881 has 2 divisors, whose sum is σ = 2515666325882. Its totient is φ = 2515666325880.

The previous prime is 2515666325873. The next prime is 2515666325891. The reversal of 2515666325881 is 1885236665152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2515583151481 + 83174400 = 1586059^2 + 9120^2 .

It is a cyclic number.

It is not a de Polignac number, because 2515666325881 - 2³ = 2515666325873 is a prime.

It is a super-2 number, since 2×2515666325881² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2515666325891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257833162940 + 1257833162941.

It is an arithmetic number, because the mean of its divisors is an integer number (1257833162941).

Almost surely, 2^{2515666325881} is an apocalyptic number.

It is an amenable number.

2515666325881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2515666325881 is an equidigital number, since it uses as much as digits as its factorization.

2515666325881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736000, while the sum is 58.

The spelling of 2515666325881 in words is "two trillion, five hundred fifteen billion, six hundred sixty-six million, three hundred twenty-five thousand, eight hundred eighty-one".