545256681 has 8 divisors (see below), whose sum is σ = 734207424. Its totient is φ = 359905200.

The previous prime is 545256667. The next prime is 545256683. The reversal of 545256681 is 186652545.

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

It is not a de Polignac number, because 545256681 - 2⁷ = 545256553 is a prime.

It is a super-2 number, since 2×545256681² = 594609696350271522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (545256683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 899461 + ... + 900066.

It is an arithmetic number, because the mean of its divisors is an integer number (91775928).

Almost surely, 2^545256681 is an apocalyptic number.

It is an amenable number.

545256681 is a deficient number, since it is larger than the sum of its proper divisors (188950743).

545256681 is a wasteful number, since it uses less digits than its factorization.

545256681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799631.

The product of its digits is 288000, while the sum is 42.

The square root of 545256681 is about 23350.7319157238. The cubic root of 545256681 is about 816.9591323635.

The spelling of 545256681 in words is "five hundred forty-five million, two hundred fifty-six thousand, six hundred eighty-one".