54561612643 has 4 divisors (see below), whose sum is σ = 54608207848. Its totient is φ = 54515017440.

The previous prime is 54561612587. The next prime is 54561612647. The reversal of 54561612643 is 34621616545.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34621616545 = 5 ⋅6924323309.

It is a cyclic number.

It is not a de Polignac number, because 54561612643 - 2²⁹ = 54024741731 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54561612643.

It is not an unprimeable number, because it can be changed into a prime (54561612647) 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, 23295846 + ... + 23298187.

It is an arithmetic number, because the mean of its divisors is an integer number (13652051962).

Almost surely, 2^54561612643 is an apocalyptic number.

54561612643 is a deficient number, since it is larger than the sum of its proper divisors (46595205).

54561612643 is a wasteful number, since it uses less digits than its factorization.

54561612643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46595204.

The product of its digits is 518400, while the sum is 43.

The spelling of 54561612643 in words is "fifty-four billion, five hundred sixty-one million, six hundred twelve thousand, six hundred forty-three".