61404440416 has 48 divisors (see below), whose sum is σ = 131900423760. Its totient is φ = 27906785280.

The previous prime is 61404440389. The next prime is 61404440423.

61404440416 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3743080 + ... + 3759448.

It is an arithmetic number, because the mean of its divisors is an integer number (2747925495).

Almost surely, 2^61404440416 is an apocalyptic number.

It is an amenable number.

61404440416 is an abundant number, since it is smaller than the sum of its proper divisors (70495983344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61404440416 is a wasteful number, since it uses less digits than its factorization.

61404440416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27047 (or 27039 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The spelling of 61404440416 in words is "sixty-one billion, four hundred four million, four hundred forty thousand, four hundred sixteen".