50557661 has 24 divisors (see below), whose sum is σ = 64886976. Its totient is φ = 38949120.

The previous prime is 50557649. The next prime is 50557691. The reversal of 50557661 is 16675505.

It is not a de Polignac number, because 50557661 - 2¹⁰ = 50556637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50557691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51800 + ... + 52766.

It is an arithmetic number, because the mean of its divisors is an integer number (2703624).

Almost surely, 2^50557661 is an apocalyptic number.

It is an amenable number.

50557661 is a deficient number, since it is larger than the sum of its proper divisors (14329315).

50557661 is a wasteful number, since it uses less digits than its factorization.

50557661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 50557661 is about 7110.3910581627. The cubic root of 50557661 is about 369.7677163909.

The spelling of 50557661 in words is "fifty million, five hundred fifty-seven thousand, six hundred sixty-one".