61644040474 has 8 divisors (see below), whose sum is σ = 92475243360. Its totient is φ = 30818959356.

The previous prime is 61644040399. The next prime is 61644040481. The reversal of 61644040474 is 47404044616.

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

It is an unprimeable number.

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, 1505184 + ... + 1545595.

It is an arithmetic number, because the mean of its divisors is an integer number (11559405420).

Almost surely, 2^61644040474 is an apocalyptic number.

61644040474 is a deficient number, since it is larger than the sum of its proper divisors (30831202886).

61644040474 is a wasteful number, since it uses less digits than its factorization.

61644040474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060884.

The product of its (nonzero) digits is 258048, while the sum is 40.

The spelling of 61644040474 in words is "sixty-one billion, six hundred forty-four million, forty thousand, four hundred seventy-four".