51661056101 has 8 divisors (see below), whose sum is σ = 55392347520. Its totient is φ = 48006698688.

The previous prime is 51661056091. The next prime is 51661056121. The reversal of 51661056101 is 10165016615.

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 51661056101 - 2³⁴ = 34481186917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51661056121) 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, 19232111 + ... + 19234796.

It is an arithmetic number, because the mean of its divisors is an integer number (6924043440).

Almost surely, 2^51661056101 is an apocalyptic number.

It is an amenable number.

51661056101 is a deficient number, since it is larger than the sum of its proper divisors (3731291419).

51661056101 is a wasteful number, since it uses less digits than its factorization.

51661056101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38467003.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 51661056101 in words is "fifty-one billion, six hundred sixty-one million, fifty-six thousand, one hundred one".