15111400061 has 2 divisors, whose sum is σ = 15111400062. Its totient is φ = 15111400060.

The previous prime is 15111400037. The next prime is 15111400067. The reversal of 15111400061 is 16000411151.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14034903961 + 1076496100 = 118469^2 + 32810^2 .

It is a cyclic number.

It is not a de Polignac number, because 15111400061 - 2³⁰ = 14037658237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15111400067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7555700030 + 7555700031.

It is an arithmetic number, because the mean of its divisors is an integer number (7555700031).

Almost surely, 2^15111400061 is an apocalyptic number.

It is an amenable number.

15111400061 is a deficient number, since it is larger than the sum of its proper divisors (1).

15111400061 is an equidigital number, since it uses as much as digits as its factorization.

15111400061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 20.

The spelling of 15111400061 in words is "fifteen billion, one hundred eleven million, four hundred thousand, sixty-one".