49488896521 has 3 divisors (see below), whose sum is σ = 49489118983. Its totient is φ = 49488674060.

The previous prime is 49488896461. The next prime is 49488896531. The reversal of 49488896521 is 12569888494.

The square root of 49488896521 is 222461.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 47289286521 + 2199610000 = 217461^2 + 46900^2 .

It is not a de Polignac number, because 49488896521 - 2⁷ = 49488896393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49488896531) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 111231 + ... + 333691.

Almost surely, 2^49488896521 is an apocalyptic number.

49488896521 is the 222461-st square number.

49488896521 is the 111231-st centered octagonal number.

It is an amenable number.

49488896521 is a deficient number, since it is larger than the sum of its proper divisors (222462).

49488896521 is an frugal number, since it uses more digits than its factorization.

49488896521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444922 (or 222461 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 64.

Multiplying 49488896521 by its sum of digits (64), we get a square (3167289377344 = 1779688²).

The spelling of 49488896521 in words is "forty-nine billion, four hundred eighty-eight million, eight hundred ninety-six thousand, five hundred twenty-one".