2515666325891 has 2 divisors, whose sum is σ = 2515666325892. Its totient is φ = 2515666325890.

The previous prime is 2515666325881. The next prime is 2515666325899. The reversal of 2515666325891 is 1985236665152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2515666325891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2515666325891.

It is not a weakly prime, because it can be changed into another prime (2515666325899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257833162945 + 1257833162946.

It is an arithmetic number, because the mean of its divisors is an integer number (1257833162946).

Almost surely, 2^{2515666325891} is an apocalyptic number.

2515666325891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2515666325891 is an equidigital number, since it uses as much as digits as its factorization.

2515666325891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328000, while the sum is 59.

The spelling of 2515666325891 in words is "two trillion, five hundred fifteen billion, six hundred sixty-six million, three hundred twenty-five thousand, eight hundred ninety-one".