61434405444 has 12 divisors (see below), whose sum is σ = 143346946064. Its totient is φ = 20478135144.

The previous prime is 61434405377. The next prime is 61434405449. The reversal of 61434405444 is 44450443416.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (61434405449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2559766882 + ... + 2559766905.

Almost surely, 2^61434405444 is an apocalyptic number.

It is an amenable number.

61434405444 is an abundant number, since it is smaller than the sum of its proper divisors (81912540620).

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

61434405444 is a wasteful number, since it uses less digits than its factorization.

61434405444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5119533794 (or 5119533792 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 39.

The spelling of 61434405444 in words is "sixty-one billion, four hundred thirty-four million, four hundred five thousand, four hundred forty-four".