240727395457 has 2 divisors, whose sum is σ = 240727395458. Its totient is φ = 240727395456.

The previous prime is 240727395427. The next prime is 240727395463. The reversal of 240727395457 is 754593727042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144741441601 + 95985953856 = 380449^2 + 309816^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240727395457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 240727395398 and 240727395407.

It is not a weakly prime, because it can be changed into another prime (240727395427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120363697728 + 120363697729.

It is an arithmetic number, because the mean of its divisors is an integer number (120363697729).

Almost surely, 2^240727395457 is an apocalyptic number.

It is an amenable number.

240727395457 is a deficient number, since it is larger than the sum of its proper divisors (1).

240727395457 is an equidigital number, since it uses as much as digits as its factorization.

240727395457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14817600, while the sum is 55.

The spelling of 240727395457 in words is "two hundred forty billion, seven hundred twenty-seven million, three hundred ninety-five thousand, four hundred fifty-seven".