55661510611 has 8 divisors (see below), whose sum is σ = 63618138720. Its totient is φ = 47706128448.

The previous prime is 55661510609. The next prime is 55661510633. The reversal of 55661510611 is 11601516655.

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 55661510611 - 2¹ = 55661510609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55661510651) 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, 213706 + ... + 396223.

It is an arithmetic number, because the mean of its divisors is an integer number (7952267340).

Almost surely, 2^55661510611 is an apocalyptic number.

55661510611 is a deficient number, since it is larger than the sum of its proper divisors (7956628109).

55661510611 is a wasteful number, since it uses less digits than its factorization.

55661510611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622973.

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 55661510611 in words is "fifty-five billion, six hundred sixty-one million, five hundred ten thousand, six hundred eleven".