55401265126543 has 16 divisors (see below), whose sum is σ = 64885176532800. Its totient is φ = 47282992608768.

The previous prime is 55401265126481. The next prime is 55401265126573. The reversal of 55401265126543 is 34562156210455.

It is not a de Polignac number, because 55401265126543 - 2¹³ = 55401265118351 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55401265126573) 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, 346528930 + ... + 346688767.

It is an arithmetic number, because the mean of its divisors is an integer number (4055323533300).

Almost surely, 2^{55401265126543} is an apocalyptic number.

55401265126543 is a deficient number, since it is larger than the sum of its proper divisors (9483911406257).

55401265126543 is an equidigital number, since it uses as much as digits as its factorization.

55401265126543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693217951 (or 693217937 counting only the distinct ones).

The product of its (nonzero) digits is 4320000, while the sum is 49.

The spelling of 55401265126543 in words is "fifty-five trillion, four hundred one billion, two hundred sixty-five million, one hundred twenty-six thousand, five hundred forty-three".