55681065645 has 8 divisors (see below), whose sum is σ = 89089705056. Its totient is φ = 29696568336.

The previous prime is 55681065613. The next prime is 55681065647. The reversal of 55681065645 is 54656018655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55681065645 - 2⁵ = 55681065613 is a prime.

It is a super-3 number, since 3×55681065645³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55681065647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1856035507 + ... + 1856035536.

It is an arithmetic number, because the mean of its divisors is an integer number (11136213132).

Almost surely, 2^55681065645 is an apocalyptic number.

It is an amenable number.

55681065645 is a deficient number, since it is larger than the sum of its proper divisors (33408639411).

55681065645 is a wasteful number, since it uses less digits than its factorization.

55681065645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3712071051.

The product of its (nonzero) digits is 4320000, while the sum is 51.

The spelling of 55681065645 in words is "fifty-five billion, six hundred eighty-one million, sixty-five thousand, six hundred forty-five".