49774148521 has 6 divisors (see below), whose sum is σ = 51549683822. Its totient is φ = 48057797760.

The previous prime is 49774148519. The next prime is 49774148531. The reversal of 49774148521 is 12584147794.

It can be written as a sum of positive squares in 3 ways, for example, as 23674130496 + 26100018025 = 153864^2 + 161555^2 .

It is not a de Polignac number, because 49774148521 - 2¹ = 49774148519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49774148531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29591400 + ... + 29593081.

Almost surely, 2^49774148521 is an apocalyptic number.

It is an amenable number.

49774148521 is a deficient number, since it is larger than the sum of its proper divisors (1775535301).

49774148521 is an equidigital number, since it uses as much as digits as its factorization.

49774148521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59184539 (or 59184510 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 52.

The spelling of 49774148521 in words is "forty-nine billion, seven hundred seventy-four million, one hundred forty-eight thousand, five hundred twenty-one".