55208720387528 has 16 divisors (see below), whose sum is σ = 105469489420380. Its totient is φ = 27083523208768.

The previous prime is 55208720387497. The next prime is 55208720387533. The reversal of 55208720387528 is 82578302780255.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 55069727126404 + 138993261124 = 7420898^2 + 372818^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65104622675 + ... + 65104623522.

Almost surely, 2^{55208720387528} is an apocalyptic number.

It is an amenable number.

55208720387528 is a deficient number, since it is larger than the sum of its proper divisors (50260769032852).

55208720387528 is a wasteful number, since it uses less digits than its factorization.

55208720387528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130209246256 (or 130209246252 counting only the distinct ones).

The product of its (nonzero) digits is 75264000, while the sum is 62.

The spelling of 55208720387528 in words is "fifty-five trillion, two hundred eight billion, seven hundred twenty million, three hundred eighty-seven thousand, five hundred twenty-eight".