55405203040 has 144 divisors (see below), whose sum is σ = 147766547376. Its totient is φ = 19602570240.

The previous prime is 55405202971. The next prime is 55405203089. The reversal of 55405203040 is 4030250455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 677647 + ... + 754993.

It is an arithmetic number, because the mean of its divisors is an integer number (1026156579).

Almost surely, 2^55405203040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55405203040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73883273688).

55405203040 is an abundant number, since it is smaller than the sum of its proper divisors (92361344336).

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

55405203040 is a wasteful number, since it uses less digits than its factorization.

55405203040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77421 (or 77402 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 28.

Adding to 55405203040 its reverse (4030250455), we get a palindrome (59435453495).

The spelling of 55405203040 in words is "fifty-five billion, four hundred five million, two hundred three thousand, forty".