61650055561 has 8 divisors (see below), whose sum is σ = 62690337504. Its totient is φ = 60613307040.

The previous prime is 61650055559. The next prime is 61650055583. The reversal of 61650055561 is 16555005616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61650055561 - 2¹ = 61650055559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61650055591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 848155 + ... + 917968.

It is an arithmetic number, because the mean of its divisors is an integer number (7836292188).

Almost surely, 2^61650055561 is an apocalyptic number.

It is an amenable number.

61650055561 is a deficient number, since it is larger than the sum of its proper divisors (1040281943).

61650055561 is a wasteful number, since it uses less digits than its factorization.

61650055561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766711.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 61650055561 in words is "sixty-one billion, six hundred fifty million, fifty-five thousand, five hundred sixty-one".