61543109752 has 8 divisors (see below), whose sum is σ = 115393330800. Its totient is φ = 30771554872.

The previous prime is 61543109743. The next prime is 61543109783. The reversal of 61543109752 is 25790134516.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 61543109699 and 61543109708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3846444352 + ... + 3846444367.

It is an arithmetic number, because the mean of its divisors is an integer number (14424166350).

Almost surely, 2^61543109752 is an apocalyptic number.

It is an amenable number.

61543109752 is a deficient number, since it is larger than the sum of its proper divisors (53850221048).

61543109752 is a wasteful number, since it uses less digits than its factorization.

61543109752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7692888725 (or 7692888721 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 61543109752 in words is "sixty-one billion, five hundred forty-three million, one hundred nine thousand, seven hundred fifty-two".