61443434416 has 40 divisors (see below), whose sum is σ = 146518962464. Its totient is φ = 24307292160.

The previous prime is 61443434413. The next prime is 61443434443.

61443434416 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×61443434416² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61443434413) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 21098625 + ... + 21101536.

Almost surely, 2^61443434416 is an apocalyptic number.

It is an amenable number.

61443434416 is an abundant number, since it is smaller than the sum of its proper divisors (85075528048).

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

61443434416 is a wasteful number, since it uses less digits than its factorization.

61443434416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42200189 (or 42200183 counting only the distinct ones).

The product of its digits is 331776, while the sum is 40.

The spelling of 61443434416 in words is "sixty-one billion, four hundred forty-three million, four hundred thirty-four thousand, four hundred sixteen".