50165501661 has 80 divisors (see below), whose sum is σ = 83898859968. Its totient is φ = 29607379200.

The previous prime is 50165501657. The next prime is 50165501681. The reversal of 50165501661 is 16610556105.

It is not a de Polignac number, because 50165501661 - 2² = 50165501657 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50165501681) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 29114346 + ... + 29116068.

Almost surely, 2^50165501661 is an apocalyptic number.

It is an amenable number.

50165501661 is a deficient number, since it is larger than the sum of its proper divisors (33733358307).

50165501661 is a wasteful number, since it uses less digits than its factorization.

50165501661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584 (or 2575 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 50165501661 in words is "fifty billion, one hundred sixty-five million, five hundred one thousand, six hundred sixty-one".