45542547649 has 3 divisors (see below), whose sum is σ = 45542761057. Its totient is φ = 45542334242.

The previous prime is 45542547637. The next prime is 45542547683. The reversal of 45542547649 is 94674524554.

The square root of 45542547649 is 213407.

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 is not a de Polignac number, because 45542547649 - 2²¹ = 45540450497 is a prime.

It is a super-2 number, since 2×45542547649² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45542547649.

It is not an unprimeable number, because it can be changed into a prime (45542547689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 106704 + ... + 320110.

Almost surely, 2^45542547649 is an apocalyptic number.

45542547649 is the 213407-th square number.

45542547649 is the 106704-th centered octagonal number.

It is an amenable number.

45542547649 is a deficient number, since it is larger than the sum of its proper divisors (213408).

45542547649 is an frugal number, since it uses more digits than its factorization.

45542547649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426814 (or 213407 counting only the distinct ones).

The product of its digits is 24192000, while the sum is 55.

The spelling of 45542547649 in words is "forty-five billion, five hundred forty-two million, five hundred forty-seven thousand, six hundred forty-nine".