45505049891 has 8 divisors (see below), whose sum is σ = 52987012704. Its totient is φ = 38268397440.

The previous prime is 45505049873. The next prime is 45505049899. The reversal of 45505049891 is 19894050554.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45505049891 - 2¹⁰ = 45505048867 is a prime.

It is a super-2 number, since 2×45505049891² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45505049899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61327190 + ... + 61327931.

It is an arithmetic number, because the mean of its divisors is an integer number (6623376588).

Almost surely, 2^45505049891 is an apocalyptic number.

45505049891 is a deficient number, since it is larger than the sum of its proper divisors (7481962813).

45505049891 is a wasteful number, since it uses less digits than its factorization.

45505049891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122655181.

The product of its (nonzero) digits is 1296000, while the sum is 50.

The spelling of 45505049891 in words is "forty-five billion, five hundred five million, forty-nine thousand, eight hundred ninety-one".