15599955011 has 2 divisors, whose sum is σ = 15599955012. Its totient is φ = 15599955010.

The previous prime is 15599955001. The next prime is 15599955013. The reversal of 15599955011 is 11055999551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15599955011 - 2²² = 15595760707 is a prime.

Together with 15599955013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15599955013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7799977505 + 7799977506.

It is an arithmetic number, because the mean of its divisors is an integer number (7799977506).

Almost surely, 2^15599955011 is an apocalyptic number.

15599955011 is a deficient number, since it is larger than the sum of its proper divisors (1).

15599955011 is an equidigital number, since it uses as much as digits as its factorization.

15599955011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 455625, while the sum is 50.

The spelling of 15599955011 in words is "fifteen billion, five hundred ninety-nine million, nine hundred fifty-five thousand, eleven".