257022805221155 has 4 divisors (see below), whose sum is σ = 308427366265392. Its totient is φ = 205618244176920.

The previous prime is 257022805221151. The next prime is 257022805221167. The reversal of 257022805221155 is 551122508220752.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 257022805221155 - 2² = 257022805221151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257022805221151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25702280522111 + ... + 25702280522120.

It is an arithmetic number, because the mean of its divisors is an integer number (77106841566348).

Almost surely, 2^{257022805221155} is an apocalyptic number.

257022805221155 is a deficient number, since it is larger than the sum of its proper divisors (51404561044237).

257022805221155 is an equidigital number, since it uses as much as digits as its factorization.

257022805221155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51404561044236.

The product of its (nonzero) digits is 1120000, while the sum is 47.

The spelling of 257022805221155 in words is "two hundred fifty-seven trillion, twenty-two billion, eight hundred five million, two hundred twenty-one thousand, one hundred fifty-five".