49781311523 has 4 divisors (see below), whose sum is σ = 49782001248. Its totient is φ = 49780621800.

The previous prime is 49781311519. The next prime is 49781311583. The reversal of 49781311523 is 32511318794.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 49781311523 - 2² = 49781311519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49781311583) 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, 222011 + ... + 385812.

It is an arithmetic number, because the mean of its divisors is an integer number (12445500312).

Almost surely, 2^49781311523 is an apocalyptic number.

49781311523 is a deficient number, since it is larger than the sum of its proper divisors (689725).

49781311523 is an equidigital number, since it uses as much as digits as its factorization.

49781311523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689724.

The product of its digits is 181440, while the sum is 44.

The spelling of 49781311523 in words is "forty-nine billion, seven hundred eighty-one million, three hundred eleven thousand, five hundred twenty-three".