5421146657561 has 16 divisors (see below), whose sum is σ = 5620908249600. Its totient is φ = 5222944108800.

The previous prime is 5421146657557. The next prime is 5421146657617. The reversal of 5421146657561 is 1657566411245.

It is a cyclic number.

It is not a de Polignac number, because 5421146657561 - 2² = 5421146657557 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 (5421146657461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124771601 + ... + 124815041.

It is an arithmetic number, because the mean of its divisors is an integer number (351306765600).

Almost surely, 2^{5421146657561} is an apocalyptic number.

It is an amenable number.

5421146657561 is a deficient number, since it is larger than the sum of its proper divisors (199761592039).

5421146657561 is a wasteful number, since it uses less digits than its factorization.

5421146657561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61280.

The product of its digits is 6048000, while the sum is 53.

The spelling of 5421146657561 in words is "five trillion, four hundred twenty-one billion, one hundred forty-six million, six hundred fifty-seven thousand, five hundred sixty-one".