1208641178957 has 16 divisors (see below), whose sum is σ = 1255594401600. Its totient is φ = 1162046995200.

The previous prime is 1208641178897. The next prime is 1208641178993. The reversal of 1208641178957 is 7598711468021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1208641178957 - 2²⁰ = 1208640130381 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1208641178896 and 1208641178905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1208641172957) 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, 9292469 + ... + 9421637.

It is an arithmetic number, because the mean of its divisors is an integer number (78474650100).

Almost surely, 2^{1208641178957} is an apocalyptic number.

It is an amenable number.

1208641178957 is a deficient number, since it is larger than the sum of its proper divisors (46953222643).

1208641178957 is a wasteful number, since it uses less digits than its factorization.

1208641178957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130556.

The product of its (nonzero) digits is 6773760, while the sum is 59.

The spelling of 1208641178957 in words is "one trillion, two hundred eight billion, six hundred forty-one million, one hundred seventy-eight thousand, nine hundred fifty-seven".