49363664221 has 4 divisors (see below), whose sum is σ = 49366236892. Its totient is φ = 49361091552.

The previous prime is 49363664197. The next prime is 49363664261. The reversal of 49363664221 is 12246636394.

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 24653396196 + 24710268025 = 157014^2 + 157195^2 .

It is a cyclic number.

It is not a de Polignac number, because 49363664221 - 2¹³ = 49363656029 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 (49363664261) 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, 1257336 + ... + 1296001.

It is an arithmetic number, because the mean of its divisors is an integer number (12341559223).

Almost surely, 2^49363664221 is an apocalyptic number.

It is an amenable number.

49363664221 is a deficient number, since it is larger than the sum of its proper divisors (2572671).

49363664221 is a wasteful number, since it uses less digits than its factorization.

49363664221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572670.

The product of its digits is 1119744, while the sum is 46.

The spelling of 49363664221 in words is "forty-nine billion, three hundred sixty-three million, six hundred sixty-four thousand, two hundred twenty-one".