49664105021 has 4 divisors (see below), whose sum is σ = 49664948412. Its totient is φ = 49663261632.

The previous prime is 49664104981. The next prime is 49664105047. The reversal of 49664105021 is 12050146694.

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 29842562500 + 19821542521 = 172750^2 + 140789^2 .

It is a cyclic number.

It is not a de Polignac number, because 49664105021 - 2²⁶ = 49596996157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49664105081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326150 + ... + 453543.

It is an arithmetic number, because the mean of its divisors is an integer number (12416237103).

Almost surely, 2^49664105021 is an apocalyptic number.

It is an amenable number.

49664105021 is a deficient number, since it is larger than the sum of its proper divisors (843391).

49664105021 is an equidigital number, since it uses as much as digits as its factorization.

49664105021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843390.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 49664105021 in words is "forty-nine billion, six hundred sixty-four million, one hundred five thousand, twenty-one".