61515166103 has 2 divisors, whose sum is σ = 61515166104. Its totient is φ = 61515166102.

The previous prime is 61515166081. The next prime is 61515166133. The reversal of 61515166103 is 30166151516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61515166103 - 2¹⁴ = 61515149719 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61515166133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30757583051 + 30757583052.

It is an arithmetic number, because the mean of its divisors is an integer number (30757583052).

Almost surely, 2^61515166103 is an apocalyptic number.

61515166103 is a deficient number, since it is larger than the sum of its proper divisors (1).

61515166103 is an equidigital number, since it uses as much as digits as its factorization.

61515166103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 35.

The spelling of 61515166103 in words is "sixty-one billion, five hundred fifteen million, one hundred sixty-six thousand, one hundred three".