54865891605 has 32 divisors (see below), whose sum is σ = 100352980224. Its totient is φ = 25074855936.

The previous prime is 54865891559. The next prime is 54865891609. The reversal of 54865891605 is 50619856845.

It is not a de Polignac number, because 54865891605 - 2¹⁰ = 54865890581 is a prime.

It is a super-2 number, since 2×54865891605² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54865891609) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 336757 + ... + 472373.

It is an arithmetic number, because the mean of its divisors is an integer number (3136030632).

Almost surely, 2^54865891605 is an apocalyptic number.

It is an amenable number.

54865891605 is a deficient number, since it is larger than the sum of its proper divisors (45487088619).

54865891605 is a wasteful number, since it uses less digits than its factorization.

54865891605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139485.

The product of its (nonzero) digits is 10368000, while the sum is 57.

The spelling of 54865891605 in words is "fifty-four billion, eight hundred sixty-five million, eight hundred ninety-one thousand, six hundred five".