15181450061 has 2 divisors, whose sum is σ = 15181450062. Its totient is φ = 15181450060.

The previous prime is 15181450051. The next prime is 15181450147. The reversal of 15181450061 is 16005418151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14953621225 + 227828836 = 122285^2 + 15094^2 .

It is a cyclic number.

It is not a de Polignac number, because 15181450061 - 2¹⁰ = 15181449037 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15181450021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7590725030 + 7590725031.

It is an arithmetic number, because the mean of its divisors is an integer number (7590725031).

Almost surely, 2^15181450061 is an apocalyptic number.

It is an amenable number.

15181450061 is a deficient number, since it is larger than the sum of its proper divisors (1).

15181450061 is an equidigital number, since it uses as much as digits as its factorization.

15181450061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 32.

The spelling of 15181450061 in words is "fifteen billion, one hundred eighty-one million, four hundred fifty thousand, sixty-one".