55671065662721 has 4 divisors (see below), whose sum is σ = 56096035629744. Its totient is φ = 55246095695700.

The previous prime is 55671065662711. The next prime is 55671065662727. The reversal of 55671065662721 is 12726656017655.

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 a de Polignac number, because none of the positive numbers 2^k-55671065662721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55671065662727) 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, 212484983315 + ... + 212484983576.

It is an arithmetic number, because the mean of its divisors is an integer number (14024008907436).

Almost surely, 2^{55671065662721} is an apocalyptic number.

It is an amenable number.

55671065662721 is a deficient number, since it is larger than the sum of its proper divisors (424969967023).

55671065662721 is a wasteful number, since it uses less digits than its factorization.

55671065662721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424969967022.

The product of its (nonzero) digits is 31752000, while the sum is 59.

The spelling of 55671065662721 in words is "fifty-five trillion, six hundred seventy-one billion, sixty-five million, six hundred sixty-two thousand, seven hundred twenty-one".