55551541440 has 224 divisors, whose sum is σ = 179457949440. Its totient is φ = 14556860416.

The previous prime is 55551541351. The next prime is 55551541471. The reversal of 55551541440 is 4414515555.

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, 15695191 + ... + 15698729.

It is an arithmetic number, because the mean of its divisors is an integer number (801151560).

Almost surely, 2^55551541440 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 55551541440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89728974720).

55551541440 is an abundant number, since it is smaller than the sum of its proper divisors (123906408000).

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

55551541440 is a wasteful number, since it uses less digits than its factorization.

55551541440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3839 (or 3829 counting only the distinct ones).

The product of its (nonzero) digits is 200000, while the sum is 39.

The spelling of 55551541440 in words is "fifty-five billion, five hundred fifty-one million, five hundred forty-one thousand, four hundred forty".