55278055553 has 8 divisors (see below), whose sum is σ = 63788270208. Its totient is φ = 46921178304.

The previous prime is 55278055549. The next prime is 55278055561. The reversal of 55278055553 is 35555087255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55278055553 - 2² = 55278055549 is a prime.

It is a super-3 number, since 3×55278055553³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55278055543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38333576 + ... + 38335017.

It is an arithmetic number, because the mean of its divisors is an integer number (7973533776).

Almost surely, 2^55278055553 is an apocalyptic number.

It is an amenable number.

55278055553 is a deficient number, since it is larger than the sum of its proper divisors (8510214655).

55278055553 is a wasteful number, since it uses less digits than its factorization.

55278055553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76668703.

The product of its (nonzero) digits is 5250000, while the sum is 50.

The spelling of 55278055553 in words is "fifty-five billion, two hundred seventy-eight million, fifty-five thousand, five hundred fifty-three".