61105551551650 has 48 divisors (see below), whose sum is σ = 115509326037120. Its totient is φ = 24045232579200.

The previous prime is 61105551551479. The next prime is 61105551551713. The reversal of 61105551551650 is 5615515550116.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 61105551551650.

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, 17210070 + ... + 20454769.

It is an arithmetic number, because the mean of its divisors is an integer number (2406444292440).

Almost surely, 2^{61105551551650} is an apocalyptic number.

61105551551650 is a deficient number, since it is larger than the sum of its proper divisors (54403774485470).

61105551551650 is a wasteful number, since it uses less digits than its factorization.

61105551551650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37665379 (or 37665374 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 46.

The spelling of 61105551551650 in words is "sixty-one trillion, one hundred five billion, five hundred fifty-one million, five hundred fifty-one thousand, six hundred fifty".