545604761 has 4 divisors (see below), whose sum is σ = 587574372. Its totient is φ = 503635152.

The previous prime is 545604757. The next prime is 545604767. The reversal of 545604761 is 167406545.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 167406545 = 5 ⋅33481309.

It can be written as a sum of positive squares in 2 ways, for example, as 251825161 + 293779600 = 15869^2 + 17140^2 .

It is a cyclic number.

It is not a de Polignac number, because 545604761 - 2² = 545604757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (545604767) 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, 20984786 + ... + 20984811.

It is an arithmetic number, because the mean of its divisors is an integer number (146893593).

Almost surely, 2^545604761 is an apocalyptic number.

It is an amenable number.

545604761 is a deficient number, since it is larger than the sum of its proper divisors (41969611).

545604761 is a wasteful number, since it uses less digits than its factorization.

545604761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41969610.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 545604761 is about 23358.1840261609. The cubic root of 545604761 is about 817.1329383616.

The spelling of 545604761 in words is "five hundred forty-five million, six hundred four thousand, seven hundred sixty-one".