61516105059 has 4 divisors (see below), whose sum is σ = 82021473416. Its totient is φ = 41010736704.

The previous prime is 61516105037. The next prime is 61516105069. The reversal of 61516105059 is 95050161516.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61516105059 - 2¹⁹ = 61515580771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61516105009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10252684174 + ... + 10252684179.

It is an arithmetic number, because the mean of its divisors is an integer number (20505368354).

Almost surely, 2^61516105059 is an apocalyptic number.

61516105059 is a deficient number, since it is larger than the sum of its proper divisors (20505368357).

61516105059 is a wasteful number, since it uses less digits than its factorization.

61516105059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20505368356.

The product of its (nonzero) digits is 40500, while the sum is 39.

The spelling of 61516105059 in words is "sixty-one billion, five hundred sixteen million, one hundred five thousand, fifty-nine".