1591668260856 has 64 divisors (see below), whose sum is σ = 4421595859200. Its totient is φ = 530520670944.

The previous prime is 1591668260821. The next prime is 1591668260863. The reversal of 1591668260856 is 6580628661951.

It is a happy number.

1591668260856 is a `hidden beast` number, since 1 + 5 + 9 + 16 + 6 + 8 + 2 + 608 + 5 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1591668260793 and 1591668260802.

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, 3102661 + ... + 3579083.

It is an arithmetic number, because the mean of its divisors is an integer number (69087435300).

Almost surely, 2^{1591668260856} is an apocalyptic number.

It is an amenable number.

1591668260856 is an abundant number, since it is smaller than the sum of its proper divisors (2829927598344).

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

1591668260856 is a wasteful number, since it uses less digits than its factorization.

1591668260856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491905 (or 491895 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 63.

The spelling of 1591668260856 in words is "one trillion, five hundred ninety-one billion, six hundred sixty-eight million, two hundred sixty thousand, eight hundred fifty-six".