61663905754 has 32 divisors (see below), whose sum is σ = 102152793600. Its totient is φ = 27683951040.

The previous prime is 61663905713. The next prime is 61663905773. The reversal of 61663905754 is 45750936616.

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, 719607 + ... + 800725.

It is an arithmetic number, because the mean of its divisors is an integer number (3192274800).

Almost surely, 2^61663905754 is an apocalyptic number.

61663905754 is a deficient number, since it is larger than the sum of its proper divisors (40488887846).

61663905754 is a wasteful number, since it uses less digits than its factorization.

61663905754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81558.

The product of its (nonzero) digits is 4082400, while the sum is 52.

The spelling of 61663905754 in words is "sixty-one billion, six hundred sixty-three million, nine hundred five thousand, seven hundred fifty-four".