49540398309 has 16 divisors (see below), whose sum is σ = 77710429440. Its totient is φ = 31084171200.

The previous prime is 49540398227. The next prime is 49540398407. The reversal of 49540398309 is 90389304594.

49540398309 is a `hidden beast` number, since 4 + 9 + 540 + 3 + 98 + 3 + 0 + 9 = 666.

It is not a de Polignac number, because 49540398309 - 2¹¹ = 49540396261 is a prime.

It is a super-2 number, since 2×49540398309² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49540388309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53965117 + ... + 53966034.

It is an arithmetic number, because the mean of its divisors is an integer number (4856901840).

Almost surely, 2^49540398309 is an apocalyptic number.

It is an amenable number.

49540398309 is a deficient number, since it is larger than the sum of its proper divisors (28170031131).

49540398309 is a wasteful number, since it uses less digits than its factorization.

49540398309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107931177 (or 107931171 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 49540398309 in words is "forty-nine billion, five hundred forty million, three hundred ninety-eight thousand, three hundred nine".