545865807 has 4 divisors (see below), whose sum is σ = 727821080. Its totient is φ = 363910536.

The previous prime is 545865799. The next prime is 545865809. The reversal of 545865807 is 708568545.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 545865807 - 2³ = 545865799 is a prime.

It is a super-2 number, since 2×545865807² = 595938958503522498, 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 (545865809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90977632 + ... + 90977637.

It is an arithmetic number, because the mean of its divisors is an integer number (181955270).

Almost surely, 2^545865807 is an apocalyptic number.

545865807 is a deficient number, since it is larger than the sum of its proper divisors (181955273).

545865807 is a wasteful number, since it uses less digits than its factorization.

545865807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181955272.

The product of its (nonzero) digits is 1344000, while the sum is 48.

The square root of 545865807 is about 23363.7712495222. The cubic root of 545865807 is about 817.2632373679.

The spelling of 545865807 in words is "five hundred forty-five million, eight hundred sixty-five thousand, eight hundred seven".