49540666551 has 4 divisors (see below), whose sum is σ = 66054222072. Its totient is φ = 33027111032.

The previous prime is 49540666543. The next prime is 49540666577. The reversal of 49540666551 is 15566604594.

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 49540666551 - 2³ = 49540666543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 49540666494 and 49540666503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49540666531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8256777756 + ... + 8256777761.

It is an arithmetic number, because the mean of its divisors is an integer number (16513555518).

Almost surely, 2^49540666551 is an apocalyptic number.

49540666551 is a deficient number, since it is larger than the sum of its proper divisors (16513555521).

49540666551 is a wasteful number, since it uses less digits than its factorization.

49540666551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16513555520.

The product of its (nonzero) digits is 3888000, while the sum is 51.

The spelling of 49540666551 in words is "forty-nine billion, five hundred forty million, six hundred sixty-six thousand, five hundred fifty-one".