61683503443505 has 16 divisors (see below), whose sum is σ = 74877637788624. Its totient is φ = 48778437427200.

The previous prime is 61683503443433. The next prime is 61683503443547. The reversal of 61683503443505 is 50534430538616.

It can be written as a sum of positive squares in 8 ways, for example, as 8883922709281 + 52799580734224 = 2980591^2 + 7266332^2 .

It is not a de Polignac number, because 61683503443505 - 2¹⁸ = 61683503181361 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203417696 + ... + 203720705.

It is an arithmetic number, because the mean of its divisors is an integer number (4679852361789).

Almost surely, 2^{61683503443505} is an apocalyptic number.

It is an amenable number.

61683503443505 is a deficient number, since it is larger than the sum of its proper divisors (13194134345119).

61683503443505 is a wasteful number, since it uses less digits than its factorization.

61683503443505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407138756.

The product of its (nonzero) digits is 15552000, while the sum is 53.

The spelling of 61683503443505 in words is "sixty-one trillion, six hundred eighty-three billion, five hundred three million, four hundred forty-three thousand, five hundred five".