55648367621 has 16 divisors (see below), whose sum is σ = 69926092800. Its totient is φ = 43020920880.

The previous prime is 55648367611. The next prime is 55648367633. The reversal of 55648367621 is 12676384655.

It is a happy number.

55648367621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55648367621 - 2¹⁸ = 55648105477 is a prime.

It is a super-2 number, since 2×55648367621² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55648367611) 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, 2835521 + ... + 2855078.

It is an arithmetic number, because the mean of its divisors is an integer number (4370380800).

Almost surely, 2^55648367621 is an apocalyptic number.

It is an amenable number.

55648367621 is a deficient number, since it is larger than the sum of its proper divisors (14277725179).

55648367621 is a wasteful number, since it uses less digits than its factorization.

55648367621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5690744.

The product of its digits is 7257600, while the sum is 53.

The spelling of 55648367621 in words is "fifty-five billion, six hundred forty-eight million, three hundred sixty-seven thousand, six hundred twenty-one".