49390909385 has 4 divisors (see below), whose sum is σ = 59269091268. Its totient is φ = 39512727504.

The previous prime is 49390909361. The next prime is 49390909417. The reversal of 49390909385 is 58390909394.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6684207049 + 42706702336 = 81757^2 + 206656^2 .

It is a cyclic number.

It is not a de Polignac number, because 49390909385 - 2²⁰ = 49389860809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4939090934 + ... + 4939090943.

It is an arithmetic number, because the mean of its divisors is an integer number (14817272817).

Almost surely, 2^49390909385 is an apocalyptic number.

It is an amenable number.

49390909385 is a deficient number, since it is larger than the sum of its proper divisors (9878181883).

49390909385 is an equidigital number, since it uses as much as digits as its factorization.

49390909385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9878181882.

The product of its (nonzero) digits is 9447840, while the sum is 59.

Subtracting 49390909385 from its reverse (58390909394), we obtain a palindrome (9000000009).

The spelling of 49390909385 in words is "forty-nine billion, three hundred ninety million, nine hundred nine thousand, three hundred eighty-five".