61405005512 has 16 divisors (see below), whose sum is σ = 117811929840. Its totient is φ = 29988490896.

The previous prime is 61405005463. The next prime is 61405005517. The reversal of 61405005512 is 21550050416.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (61405005517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89251118 + ... + 89251805.

It is an arithmetic number, because the mean of its divisors is an integer number (7363245615).

Almost surely, 2^61405005512 is an apocalyptic number.

It is an amenable number.

61405005512 is a deficient number, since it is larger than the sum of its proper divisors (56406924328).

61405005512 is a wasteful number, since it uses less digits than its factorization.

61405005512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178502972 (or 178502968 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 61405005512 its reverse (21550050416), we get a palindrome (82955055928).

The spelling of 61405005512 in words is "sixty-one billion, four hundred five million, five thousand, five hundred twelve".