15565106149 has 2 divisors, whose sum is σ = 15565106150. Its totient is φ = 15565106148.

The previous prime is 15565106101. The next prime is 15565106189. The reversal of 15565106149 is 94160156551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14612457924 + 952648225 = 120882^2 + 30865^2 .

It is a cyclic number.

It is not a de Polignac number, because 15565106149 - 2⁷ = 15565106021 is a prime.

It is a super-2 number, since 2×15565106149² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15565106189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7782553074 + 7782553075.

It is an arithmetic number, because the mean of its divisors is an integer number (7782553075).

Almost surely, 2^15565106149 is an apocalyptic number.

It is an amenable number.

15565106149 is a deficient number, since it is larger than the sum of its proper divisors (1).

15565106149 is an equidigital number, since it uses as much as digits as its factorization.

15565106149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 15565106149 in words is "fifteen billion, five hundred sixty-five million, one hundred six thousand, one hundred forty-nine".