340128642157 has 2 divisors, whose sum is σ = 340128642158. Its totient is φ = 340128642156.

The previous prime is 340128642149. The next prime is 340128642257. The reversal of 340128642157 is 751246821043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328029962121 + 12098680036 = 572739^2 + 109994^2 .

It is a cyclic number.

It is not a de Polignac number, because 340128642157 - 2³ = 340128642149 is a prime.

It is a super-2 number, since 2×340128642157² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340128642257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170064321078 + 170064321079.

It is an arithmetic number, because the mean of its divisors is an integer number (170064321079).

Almost surely, 2^340128642157 is an apocalyptic number.

It is an amenable number.

340128642157 is a deficient number, since it is larger than the sum of its proper divisors (1).

340128642157 is an equidigital number, since it uses as much as digits as its factorization.

340128642157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 43.

It can be divided in two parts, 3401286 and 42157, that added together give a palindrome (3443443).

The spelling of 340128642157 in words is "three hundred forty billion, one hundred twenty-eight million, six hundred forty-two thousand, one hundred fifty-seven".