49915557 has 6 divisors (see below), whose sum is σ = 72100262. Its totient is φ = 33277032.

The previous prime is 49915529. The next prime is 49915571. The reversal of 49915557 is 75551994.

49915557 is a `hidden beast` number, since 4 + 9 + 91 + 5 + 557 = 666.

It can be written as a sum of positive squares in only one way, i.e., 46908801 + 3006756 = 6849^2 + 1734^2 .

It is not a de Polignac number, because 49915557 - 2⁶ = 49915493 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 (49915577) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2773078 + ... + 2773095.

Almost surely, 2^49915557 is an apocalyptic number.

It is an amenable number.

49915557 is a deficient number, since it is larger than the sum of its proper divisors (22184705).

49915557 is a wasteful number, since it uses less digits than its factorization.

49915557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5546179 (or 5546176 counting only the distinct ones).

The product of its digits is 283500, while the sum is 45.

The square root of 49915557 is about 7065.0942668870. The cubic root of 49915557 is about 368.1956392201.

The spelling of 49915557 in words is "forty-nine million, nine hundred fifteen thousand, five hundred fifty-seven".