49905561 has 8 divisors (see below), whose sum is σ = 69433920. Its totient is φ = 31823792.

The previous prime is 49905551. The next prime is 49905589. The reversal of 49905561 is 16550994.

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 49905561 - 2⁶ = 49905497 is a prime.

It is a super-3 number, since 3×49905561³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (49905511) 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, 361566 + ... + 361703.

It is an arithmetic number, because the mean of its divisors is an integer number (8679240).

Almost surely, 2^49905561 is an apocalyptic number.

It is an amenable number.

49905561 is a deficient number, since it is larger than the sum of its proper divisors (19528359).

49905561 is a wasteful number, since it uses less digits than its factorization.

49905561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723295.

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 49905561 is about 7064.3868099078. The cubic root of 49905561 is about 368.1710595130.

The spelling of 49905561 in words is "forty-nine million, nine hundred five thousand, five hundred sixty-one".