55195444440 has 160 divisors (see below), whose sum is σ = 189018949680. Its totient is φ = 14441027328.

The previous prime is 55195444439. The next prime is 55195444471. The reversal of 55195444440 is 4444459155.

55195444440 is a `hidden beast` number, since 5 + 519 + 54 + 4 + 44 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11007 + ... + 332433.

Almost surely, 2^55195444440 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 55195444440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94509474840).

55195444440 is an abundant number, since it is smaller than the sum of its proper divisors (133823505240).

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

55195444440 is a wasteful number, since it uses less digits than its factorization.

55195444440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321503 (or 321490 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 45.

The spelling of 55195444440 in words is "fifty-five billion, one hundred ninety-five million, four hundred forty-four thousand, four hundred forty".