61162120259 has 4 divisors (see below), whose sum is σ = 64381179240. Its totient is φ = 57943061280.

The previous prime is 61162120207. The next prime is 61162120291. The reversal of 61162120259 is 95202126116.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61162120259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61162120759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1609529462 + ... + 1609529499.

It is an arithmetic number, because the mean of its divisors is an integer number (16095294810).

Almost surely, 2^61162120259 is an apocalyptic number.

61162120259 is a deficient number, since it is larger than the sum of its proper divisors (3219058981).

61162120259 is a wasteful number, since it uses less digits than its factorization.

61162120259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219058980.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 61162120259 in words is "sixty-one billion, one hundred sixty-two million, one hundred twenty thousand, two hundred fifty-nine".