2011615999969 has 2 divisors, whose sum is σ = 2011615999970. Its totient is φ = 2011615999968.

The previous prime is 2011615999949. The next prime is 2011616000011. The reversal of 2011615999969 is 9699995161102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1840534495569 + 171081504400 = 1356663^2 + 413620^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011615999969 - 2¹⁷ = 2011615868897 is a prime.

It is a super-2 number, since 2×2011615999969² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2011615999919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005807999984 + 1005807999985.

It is an arithmetic number, because the mean of its divisors is an integer number (1005807999985).

Almost surely, 2^{2011615999969} is an apocalyptic number.

It is an amenable number.

2011615999969 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011615999969 is an equidigital number, since it uses as much as digits as its factorization.

2011615999969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21257640, while the sum is 67.

The spelling of 2011615999969 in words is "two trillion, eleven billion, six hundred fifteen million, nine hundred ninety-nine thousand, nine hundred sixty-nine".