55403967840 has 192 divisors, whose sum is σ = 188248971456. Its totient is φ = 13616013312.

The previous prime is 55403967823. The next prime is 55403967889. The reversal of 55403967840 is 4876930455.

55403967840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4067922 + ... + 4081518.

It is an arithmetic number, because the mean of its divisors is an integer number (980463393).

Almost surely, 2^55403967840 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 55403967840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94124485728).

55403967840 is an abundant number, since it is smaller than the sum of its proper divisors (132845003616).

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

55403967840 is a wasteful number, since it uses less digits than its factorization.

55403967840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14281 (or 14273 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 55403967840 in words is "fifty-five billion, four hundred three million, nine hundred sixty-seven thousand, eight hundred forty".