49763561 has 4 divisors (see below), whose sum is σ = 49906500. Its totient is φ = 49620624.

The previous prime is 49763551. The next prime is 49763591. The reversal of 49763561 is 16536794.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16536794 = 2 ⋅8268397.

It can be written as a sum of positive squares in 2 ways, for example, as 14776336 + 34987225 = 3844^2 + 5915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49763561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49763501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70946 + ... + 71643.

It is an arithmetic number, because the mean of its divisors is an integer number (12476625).

Almost surely, 2^49763561 is an apocalyptic number.

It is an amenable number.

49763561 is a deficient number, since it is larger than the sum of its proper divisors (142939).

49763561 is a wasteful number, since it uses less digits than its factorization.

49763561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142938.

The product of its digits is 136080, while the sum is 41.

The square root of 49763561 is about 7054.3292381346. The cubic root of 49763561 is about 367.8215329699.

The spelling of 49763561 in words is "forty-nine million, seven hundred sixty-three thousand, five hundred sixty-one".