55421543040 has 64 divisors (see below), whose sum is σ = 176656174560. Its totient is φ = 14779077632.

The previous prime is 55421542993. The next prime is 55421543053. The reversal of 55421543040 is 4034512455.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 55421542992 and 55421543010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14430774 + ... + 14434613.

Almost surely, 2^55421543040 is an apocalyptic number.

It is an amenable number.

55421543040 is an abundant number, since it is smaller than the sum of its proper divisors (121234631520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55421543040 is a wasteful number, since it uses less digits than its factorization.

55421543040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28865409 (or 28865397 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 33.

The spelling of 55421543040 in words is "fifty-five billion, four hundred twenty-one million, five hundred forty-three thousand, forty".