49311948013 has 4 divisors (see below), whose sum is σ = 49361409340. Its totient is φ = 49262486688.

The previous prime is 49311947933. The next prime is 49311948017. The reversal of 49311948013 is 31084911394.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31084911394 = 2 ⋅15542455697.

It can be written as a sum of positive squares in 2 ways, for example, as 35312798889 + 13999149124 = 187917^2 + 118318^2 .

It is a cyclic number.

It is not a de Polignac number, because 49311948013 - 2⁹ = 49311947501 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 (49311948017) 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, 24729168 + ... + 24731161.

It is an arithmetic number, because the mean of its divisors is an integer number (12340352335).

Almost surely, 2^49311948013 is an apocalyptic number.

It is an amenable number.

49311948013 is a deficient number, since it is larger than the sum of its proper divisors (49461327).

49311948013 is an equidigital number, since it uses as much as digits as its factorization.

49311948013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49461326.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 49311948013 in words is "forty-nine billion, three hundred eleven million, nine hundred forty-eight thousand, thirteen".