11515011621679 has 2 divisors, whose sum is σ = 11515011621680. Its totient is φ = 11515011621678.

The previous prime is 11515011621637. The next prime is 11515011621691. The reversal of 11515011621679 is 97612611051511.

It is a happy number.

11515011621679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11515011621679 - 2³³ = 11506421687087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11515011321679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757505810839 + 5757505810840.

It is an arithmetic number, because the mean of its divisors is an integer number (5757505810840).

Almost surely, 2^{11515011621679} is an apocalyptic number.

11515011621679 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515011621679 is an equidigital number, since it uses as much as digits as its factorization.

11515011621679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 46.

The spelling of 11515011621679 in words is "eleven trillion, five hundred fifteen billion, eleven million, six hundred twenty-one thousand, six hundred seventy-nine".