55209763840 has 528 divisors, whose sum is σ = 172498233600. Its totient is φ = 16577003520.

The previous prime is 55209763787. The next prime is 55209763951. The reversal of 55209763840 is 4836790255.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 125762341 + ... + 125762779.

It is an arithmetic number, because the mean of its divisors is an integer number (326701200).

Almost surely, 2^55209763840 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 55209763840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86249116800).

55209763840 is an abundant number, since it is smaller than the sum of its proper divisors (117288469760).

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

55209763840 is a wasteful number, since it uses less digits than its factorization.

55209763840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 55209763840 in words is "fifty-five billion, two hundred nine million, seven hundred sixty-three thousand, eight hundred forty".