257455332722157 has 16 divisors (see below), whose sum is σ = 351987381325440. Its totient is φ = 167288207091200.

The previous prime is 257455332722131. The next prime is 257455332722209. The reversal of 257455332722157 is 751227233554752.

It is a cyclic number.

It is not a de Polignac number, because 257455332722157 - 2¹⁰ = 257455332721133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 257455332722157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257455332722957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1014971532 + ... + 1015225157.

It is an arithmetic number, because the mean of its divisors is an integer number (21999211332840).

Almost surely, 2^{257455332722157} is an apocalyptic number.

It is an amenable number.

257455332722157 is a deficient number, since it is larger than the sum of its proper divisors (94532048603283).

257455332722157 is a wasteful number, since it uses less digits than its factorization.

257455332722157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030197764.

The product of its digits is 123480000, while the sum is 60.

The spelling of 257455332722157 in words is "two hundred fifty-seven trillion, four hundred fifty-five billion, three hundred thirty-two million, seven hundred twenty-two thousand, one hundred fifty-seven".