55421443521207 has 8 divisors (see below), whose sum is σ = 82105842253680. Its totient is φ = 36947629014120.

The previous prime is 55421443521203. The next prime is 55421443521239. The reversal of 55421443521207 is 70212534412455.

55421443521207 is a `hidden beast` number, since 5 + 5 + 4 + 2 + 1 + 4 + 435 + 2 + 1 + 207 = 666.

It is not a de Polignac number, because 55421443521207 - 2² = 55421443521203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55421443521203) 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, 1026323028144 + ... + 1026323028197.

It is an arithmetic number, because the mean of its divisors is an integer number (10263230281710).

Almost surely, 2^{55421443521207} is an apocalyptic number.

55421443521207 is a deficient number, since it is larger than the sum of its proper divisors (26684398732473).

55421443521207 is a wasteful number, since it uses less digits than its factorization.

55421443521207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052646056350 (or 2052646056344 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 45.

The spelling of 55421443521207 in words is "fifty-five trillion, four hundred twenty-one billion, four hundred forty-three million, five hundred twenty-one thousand, two hundred seven".