61515227549099 has 2 divisors, whose sum is σ = 61515227549100. Its totient is φ = 61515227549098.

The previous prime is 61515227549063. The next prime is 61515227549189. The reversal of 61515227549099 is 99094572251516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61515227549099 - 2¹² = 61515227545003 is a prime.

It is not a weakly prime, because it can be changed into another prime (61515227549599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30757613774549 + 30757613774550.

It is an arithmetic number, because the mean of its divisors is an integer number (30757613774550).

Almost surely, 2^{61515227549099} is an apocalyptic number.

61515227549099 is a deficient number, since it is larger than the sum of its proper divisors (1).

61515227549099 is an equidigital number, since it uses as much as digits as its factorization.

61515227549099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236000, while the sum is 65.

The spelling of 61515227549099 in words is "sixty-one trillion, five hundred fifteen billion, two hundred twenty-seven million, five hundred forty-nine thousand, ninety-nine".