61061660551641 has 16 divisors (see below), whose sum is σ = 81431546713920. Its totient is φ = 40699774587840.

The previous prime is 61061660551637. The next prime is 61061660551673. The reversal of 61061660551641 is 14615506616016.

It is not a de Polignac number, because 61061660551641 - 2² = 61061660551637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61061660541641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 633877906 + ... + 633974228.

It is an arithmetic number, because the mean of its divisors is an integer number (5089471669620).

Almost surely, 2^{61061660551641} is an apocalyptic number.

It is an amenable number.

61061660551641 is a deficient number, since it is larger than the sum of its proper divisors (20369886162279).

61061660551641 is a wasteful number, since it uses less digits than its factorization.

61061660551641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135656.

The product of its (nonzero) digits is 777600, while the sum is 48.

The spelling of 61061660551641 in words is "sixty-one trillion, sixty-one billion, six hundred sixty million, five hundred fifty-one thousand, six hundred forty-one".