61061660551651 has 4 divisors (see below), whose sum is σ = 61666231448304. Its totient is φ = 60457089655000.

The previous prime is 61061660551637. The next prime is 61061660551673. The reversal of 61061660551651 is 15615506616016.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61061660551651 - 2¹⁹ = 61061660027363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61061660551595 and 61061660551604.

It is not an unprimeable number, because it can be changed into a prime (61061660501651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302285448175 + ... + 302285448376.

It is an arithmetic number, because the mean of its divisors is an integer number (15416557862076).

Almost surely, 2^{61061660551651} is an apocalyptic number.

61061660551651 is a deficient number, since it is larger than the sum of its proper divisors (604570896653).

61061660551651 is a wasteful number, since it uses less digits than its factorization.

61061660551651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604570896652.

The product of its (nonzero) digits is 972000, while the sum is 49.

The spelling of 61061660551651 in words is "sixty-one trillion, sixty-one billion, six hundred sixty million, five hundred fifty-one thousand, six hundred fifty-one".