61404404442 has 32 divisors (see below), whose sum is σ = 123585412608. Its totient is φ = 20338829376.

The previous prime is 61404404437. The next prime is 61404404443. The reversal of 61404404442 is 24440440416.

It is not an unprimeable number, because it can be changed into a prime (61404404443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2032983 + ... + 2062965.

It is an arithmetic number, because the mean of its divisors is an integer number (3862044144).

Almost surely, 2^61404404442 is an apocalyptic number.

61404404442 is an abundant number, since it is smaller than the sum of its proper divisors (62181008166).

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

61404404442 is a wasteful number, since it uses less digits than its factorization.

61404404442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32134.

The product of its (nonzero) digits is 49152, while the sum is 33.

Adding to 61404404442 its reverse (24440440416), we get a palindrome (85844844858).

The spelling of 61404404442 in words is "sixty-one billion, four hundred four million, four hundred four thousand, four hundred forty-two".