49778553 has 12 divisors (see below), whose sum is σ = 72954224. Its totient is φ = 30168600.

The previous prime is 49778543. The next prime is 49778609. The reversal of 49778553 is 35587794.

It is not a de Polignac number, because 49778553 - 2¹⁰ = 49777529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49778543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68203 + ... + 68928.

Almost surely, 2^49778553 is an apocalyptic number.

It is an amenable number.

49778553 is a deficient number, since it is larger than the sum of its proper divisors (23175671).

49778553 is a wasteful number, since it uses less digits than its factorization.

49778553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137156 (or 137145 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 48.

The square root of 49778553 is about 7055.3917680027. The cubic root of 49778553 is about 367.8584664653.

It can be divided in two parts, 4977 and 8553, that added together give a triangular number (13530 = T₁₆₄).

The spelling of 49778553 in words is "forty-nine million, seven hundred seventy-eight thousand, five hundred fifty-three".