61000001105556 has 96 divisors (see below), whose sum is σ = 145697239779840. Its totient is φ = 19854810031104.

The previous prime is 61000001105551. The next prime is 61000001105581. The reversal of 61000001105556 is 65550110000016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61000001105551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 626048250 + ... + 626145678.

It is an arithmetic number, because the mean of its divisors is an integer number (1517679581040).

Almost surely, 2^{61000001105556} is an apocalyptic number.

It is an amenable number.

61000001105556 is an abundant number, since it is smaller than the sum of its proper divisors (84697238674284).

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

61000001105556 is a wasteful number, since it uses less digits than its factorization.

61000001105556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100033 (or 100031 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 61000001105556 in words is "sixty-one trillion, one million, one hundred five thousand, five hundred fifty-six".