1355657240777 has 4 divisors (see below), whose sum is σ = 1549322560896. Its totient is φ = 1161991920660.

The previous prime is 1355657240753. The next prime is 1355657240779. The reversal of 1355657240777 is 7770427565531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1355657240777 - 2¹⁸ = 1355656978633 is a prime.

It is a super-2 number, since 2×1355657240777² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1355657240779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96832660049 + ... + 96832660062.

It is an arithmetic number, because the mean of its divisors is an integer number (387330640224).

Almost surely, 2^{1355657240777} is an apocalyptic number.

It is an amenable number.

1355657240777 is a deficient number, since it is larger than the sum of its proper divisors (193665320119).

1355657240777 is an equidigital number, since it uses as much as digits as its factorization.

1355657240777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193665320118.

The product of its (nonzero) digits is 43218000, while the sum is 59.

The spelling of 1355657240777 in words is "one trillion, three hundred fifty-five billion, six hundred fifty-seven million, two hundred forty thousand, seven hundred seventy-seven".