61061660551650 has 48 divisors (see below), whose sum is σ = 165199547096928. Its totient is φ = 14802826800000.

The previous prime is 61061660551637. The next prime is 61061660551673. The reversal of 61061660551650 is 5615506616016.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 61061660551650.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18503531851 + ... + 18503535150.

It is an arithmetic number, because the mean of its divisors is an integer number (3441657231186).

Almost surely, 2^{61061660551650} is an apocalyptic number.

61061660551650 is an abundant number, since it is smaller than the sum of its proper divisors (104137886545278).

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

61061660551650 is a wasteful number, since it uses less digits than its factorization.

61061660551650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37007067027 (or 37007067022 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 61061660551650 in words is "sixty-one trillion, sixty-one billion, six hundred sixty million, five hundred fifty-one thousand, six hundred fifty".