545790581 has 4 divisors (see below), whose sum is σ = 623760672. Its totient is φ = 467820492.

The previous prime is 545790547. The next prime is 545790613. The reversal of 545790581 is 185097545.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 545790581 - 2⁶ = 545790517 is a prime.

It is a super-2 number, since 2×545790581² = 595774716616635122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545790521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38985035 + ... + 38985048.

It is an arithmetic number, because the mean of its divisors is an integer number (155940168).

Almost surely, 2^545790581 is an apocalyptic number.

It is an amenable number.

545790581 is a deficient number, since it is larger than the sum of its proper divisors (77970091).

545790581 is an equidigital number, since it uses as much as digits as its factorization.

545790581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77970090.

The product of its (nonzero) digits is 252000, while the sum is 44.

The square root of 545790581 is about 23362.1613084064. The cubic root of 545790581 is about 817.2256931779.

The spelling of 545790581 in words is "five hundred forty-five million, seven hundred ninety thousand, five hundred eighty-one".