545751990 has 96 divisors (see below), whose sum is σ = 1626034176. Its totient is φ = 124407360.

The previous prime is 545751977. The next prime is 545752019. The reversal of 545751990 is 99157545.

545751990 is a `hidden beast` number, since 5 + 45 + 7 + 519 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 290755 + ... + 292625.

It is an arithmetic number, because the mean of its divisors is an integer number (16937856).

Almost surely, 2^545751990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 545751990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (813017088).

545751990 is an abundant number, since it is smaller than the sum of its proper divisors (1080282186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

545751990 is a wasteful number, since it uses less digits than its factorization.

545751990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2354 (or 2351 counting only the distinct ones).

The product of its (nonzero) digits is 283500, while the sum is 45.

The square root of 545751990 is about 23361.3353642295. The cubic root of 545751990 is about 817.2064316387.

It can be divided in two parts, 54575 and 1990, that added together give a palindrome (56565).

The spelling of 545751990 in words is "five hundred forty-five million, seven hundred fifty-one thousand, nine hundred ninety".