61218346744 has 32 divisors (see below), whose sum is σ = 118786654800. Its totient is φ = 29554536960.

The previous prime is 61218346703. The next prime is 61218346747. The reversal of 61218346744 is 44764381216.

It is a junction number, because it is equal to n+sod(n) for n = 61218346694 and 61218346703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61218346747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750609 + ... + 828160.

Almost surely, 2^61218346744 is an apocalyptic number.

It is an amenable number.

61218346744 is a deficient number, since it is larger than the sum of its proper divisors (57568308056).

61218346744 is a wasteful number, since it uses less digits than its factorization.

61218346744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578943 (or 1578939 counting only the distinct ones).

The product of its digits is 774144, while the sum is 46.

The spelling of 61218346744 in words is "sixty-one billion, two hundred eighteen million, three hundred forty-six thousand, seven hundred forty-four".