240157495659857 has 2 divisors, whose sum is σ = 240157495659858. Its totient is φ = 240157495659856.

The previous prime is 240157495659833. The next prime is 240157495659889. The reversal of 240157495659857 is 758956594751042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239130842388736 + 1026653271121 = 15463856^2 + 1013239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240157495659857 is a prime.

It is a super-2 number, since 2×240157495659857² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (240157495659827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120078747829928 + 120078747829929.

It is an arithmetic number, because the mean of its divisors is an integer number (120078747829929).

Almost surely, 2^{240157495659857} is an apocalyptic number.

It is an amenable number.

240157495659857 is a deficient number, since it is larger than the sum of its proper divisors (1).

240157495659857 is an equidigital number, since it uses as much as digits as its factorization.

240157495659857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3810240000, while the sum is 77.

The spelling of 240157495659857 in words is "two hundred forty trillion, one hundred fifty-seven billion, four hundred ninety-five million, six hundred fifty-nine thousand, eight hundred fifty-seven".