45921489849 has 27 divisors (see below), whose sum is σ = 67493898927. Its totient is φ = 30086737200.

The previous prime is 45921489847. The next prime is 45921489851. The reversal of 45921489849 is 94898412954.

The square root of 45921489849 is 214293.

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

45921489849 is a `hidden beast` number, since 4 + 59 + 21 + 489 + 84 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (45921489847) and next prime (45921489851).

It can be written as a sum of positive squares in only one way, i.e., 1493281449 + 44428208400 = 38643^2 + 210780^2 .

It is not a de Polignac number, because 45921489849 - 2¹ = 45921489847 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45921489847) 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 26 ways as a sum of consecutive naturals, for example, 39215034 + ... + 39216204.

Almost surely, 2^45921489849 is an apocalyptic number.

45921489849 is the 214293-rd square number.

45921489849 is the 107147-th centered octagonal number.

It is an amenable number.

45921489849 is a deficient number, since it is larger than the sum of its proper divisors (21572409078).

45921489849 is an frugal number, since it uses more digits than its factorization.

45921489849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2470 (or 1235 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 63.

The spelling of 45921489849 in words is "forty-five billion, nine hundred twenty-one million, four hundred eighty-nine thousand, eight hundred forty-nine".