61212441784 has 32 divisors (see below), whose sum is σ = 123956280000. Its totient is φ = 28170928512.

The previous prime is 61212441761. The next prime is 61212441791. The reversal of 61212441784 is 48714421216.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 806944 + ... + 879535.

It is an arithmetic number, because the mean of its divisors is an integer number (3873633750).

Almost surely, 2^61212441784 is an apocalyptic number.

It is an amenable number.

61212441784 is an abundant number, since it is smaller than the sum of its proper divisors (62743838216).

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

61212441784 is a wasteful number, since it uses less digits than its factorization.

61212441784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686847 (or 1686843 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The spelling of 61212441784 in words is "sixty-one billion, two hundred twelve million, four hundred forty-one thousand, seven hundred eighty-four".