546781127086561 has 4 divisors (see below), whose sum is σ = 546784274328832. Its totient is φ = 546777979844292.

The previous prime is 546781127086549. The next prime is 546781127086619. The reversal of 546781127086561 is 165680721187645.

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 546781127086561 - 2³⁷ = 546643688133089 is a prime.

It is a super-3 number, since 3×546781127086561³ (a number of 45 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (546781127086661) 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, 1573360521 + ... + 1573708006.

It is an arithmetic number, because the mean of its divisors is an integer number (136696068582208).

Almost surely, 2^{546781127086561} is an apocalyptic number.

It is an amenable number.

546781127086561 is a deficient number, since it is larger than the sum of its proper divisors (3147242271).

546781127086561 is a wasteful number, since it uses less digits than its factorization.

546781127086561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3147242270.

The product of its (nonzero) digits is 135475200, while the sum is 67.

The spelling of 546781127086561 in words is "five hundred forty-six trillion, seven hundred eighty-one billion, one hundred twenty-seven million, eighty-six thousand, five hundred sixty-one".