61115667205 has 8 divisors (see below), whose sum is σ = 73352151072. Its totient is φ = 48883633488.

The previous prime is 61115667203. The next prime is 61115667211. The reversal of 61115667205 is 50276651116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61115667205 - 2¹ = 61115667203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61115667203) 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 7 ways as a sum of consecutive naturals, for example, 1082247 + ... + 1137316.

It is an arithmetic number, because the mean of its divisors is an integer number (9169018884).

Almost surely, 2^61115667205 is an apocalyptic number.

It is an amenable number.

61115667205 is a deficient number, since it is larger than the sum of its proper divisors (12236483867).

61115667205 is a wasteful number, since it uses less digits than its factorization.

61115667205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225075.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 61115667205 in words is "sixty-one billion, one hundred fifteen million, six hundred sixty-seven thousand, two hundred five".