61142433665 has 32 divisors (see below), whose sum is σ = 79489330560. Its totient is φ = 44978125824.

The previous prime is 61142433661. The next prime is 61142433673. The reversal of 61142433665 is 56633424116.

It is a cyclic number.

It is not a de Polignac number, because 61142433665 - 2² = 61142433661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61142433661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 780047 + ... + 854843.

It is an arithmetic number, because the mean of its divisors is an integer number (2484041580).

Almost surely, 2^61142433665 is an apocalyptic number.

It is an amenable number.

61142433665 is a deficient number, since it is larger than the sum of its proper divisors (18346896895).

61142433665 is a wasteful number, since it uses less digits than its factorization.

61142433665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75041.

The product of its digits is 311040, while the sum is 41.

The spelling of 61142433665 in words is "sixty-one billion, one hundred forty-two million, four hundred thirty-three thousand, six hundred sixty-five".