1657779807068 has 48 divisors (see below), whose sum is σ = 3774233885184. Its totient is φ = 617806136640.

The previous prime is 1657779807031. The next prime is 1657779807077. The reversal of 1657779807068 is 8607089777561.

It is a junction number, because it is equal to n+sod(n) for n = 1657779806992 and 1657779807010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117001655 + ... + 117015822.

It is an arithmetic number, because the mean of its divisors is an integer number (78629872608).

Almost surely, 2^{1657779807068} is an apocalyptic number.

It is an amenable number.

1657779807068 is an abundant number, since it is smaller than the sum of its proper divisors (2116454078116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1657779807068 is a wasteful number, since it uses less digits than its factorization.

1657779807068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234017522 (or 234017520 counting only the distinct ones).

The product of its (nonzero) digits is 248935680, while the sum is 71.

The spelling of 1657779807068 in words is "one trillion, six hundred fifty-seven billion, seven hundred seventy-nine million, eight hundred seven thousand, sixty-eight".