61500501065646 has 24 divisors (see below), whose sum is σ = 135509578621560. Its totient is φ = 20152706563536.

The previous prime is 61500501065639. The next prime is 61500501065657. The reversal of 61500501065646 is 64656010500516.

61500501065646 is a `hidden beast` number, since 6 + 1 + 50 + 0 + 501 + 0 + 6 + 56 + 46 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28955037105 + ... + 28955039228.

It is an arithmetic number, because the mean of its divisors is an integer number (5646232442565).

Almost surely, 2^{61500501065646} is an apocalyptic number.

61500501065646 is an abundant number, since it is smaller than the sum of its proper divisors (74009077555914).

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

61500501065646 is a wasteful number, since it uses less digits than its factorization.

61500501065646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57910076400 (or 57910076397 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 61500501065646 in words is "sixty-one trillion, five hundred billion, five hundred one million, sixty-five thousand, six hundred forty-six".