55305025257 has 8 divisors (see below), whose sum is σ = 77621088160. Its totient is φ = 34929489600.

The previous prime is 55305025247. The next prime is 55305025283. The reversal of 55305025257 is 75252050355.

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

It is not a de Polignac number, because 55305025257 - 2⁴ = 55305025241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55305025247) 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, 485131744 + ... + 485131857.

It is an arithmetic number, because the mean of its divisors is an integer number (9702636020).

Almost surely, 2^55305025257 is an apocalyptic number.

55305025257 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

55305025257 is a deficient number, since it is larger than the sum of its proper divisors (22316062903).

55305025257 is a wasteful number, since it uses less digits than its factorization.

55305025257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970263623.

The product of its (nonzero) digits is 262500, while the sum is 39.

The spelling of 55305025257 in words is "fifty-five billion, three hundred five million, twenty-five thousand, two hundred fifty-seven".