55142033440 has 48 divisors (see below), whose sum is σ = 140294063448. Its totient is φ = 20360134656.

The previous prime is 55142033437. The next prime is 55142033477. The reversal of 55142033440 is 4433024155.

It can be written as a sum of positive squares in 4 ways, for example, as 38757009424 + 16385024016 = 196868^2 + 128004^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13253217 + ... + 13257376.

Almost surely, 2^55142033440 is an apocalyptic number.

It is an amenable number.

55142033440 is an abundant number, since it is smaller than the sum of its proper divisors (85152030008).

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

55142033440 is a wasteful number, since it uses less digits than its factorization.

55142033440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26510621 (or 26510613 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 55142033440 its reverse (4433024155), we get a palindrome (59575057595).

The spelling of 55142033440 in words is "fifty-five billion, one hundred forty-two million, thirty-three thousand, four hundred forty".