61165455212 has 12 divisors (see below), whose sum is σ = 110730565680. Its totient is φ = 29528150736.

The previous prime is 61165455209. The next prime is 61165455217. The reversal of 61165455212 is 21255456116.

It is a super-2 number, since 2×61165455212² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61165455217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263644088 + ... + 263644319.

It is an arithmetic number, because the mean of its divisors is an integer number (9227547140).

Almost surely, 2^61165455212 is an apocalyptic number.

It is an amenable number.

61165455212 is a deficient number, since it is larger than the sum of its proper divisors (49565110468).

61165455212 is a wasteful number, since it uses less digits than its factorization.

61165455212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527288440 (or 527288438 counting only the distinct ones).

The product of its digits is 72000, while the sum is 38.

The spelling of 61165455212 in words is "sixty-one billion, one hundred sixty-five million, four hundred fifty-five thousand, two hundred twelve".