61243506040 has 32 divisors (see below), whose sum is σ = 140729762880. Its totient is φ = 23976180352.

The previous prime is 61243506019. The next prime is 61243506097. The reversal of 61243506040 is 4060534216.

It is a junction number, because it is equal to n+sod(n) for n = 61243505993 and 61243506011.

It is a congruent number.

It is an unprimeable number.

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, 16286287 + ... + 16290046.

It is an arithmetic number, because the mean of its divisors is an integer number (4397805090).

Almost surely, 2^61243506040 is an apocalyptic number.

It is an amenable number.

61243506040 is an abundant number, since it is smaller than the sum of its proper divisors (79486256840).

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

61243506040 is a wasteful number, since it uses less digits than its factorization.

61243506040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32576391 (or 32576387 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 61243506040 in words is "sixty-one billion, two hundred forty-three million, five hundred six thousand, forty".