1971473850456 has 64 divisors (see below), whose sum is σ = 5395881398400. Its totient is φ = 595290259200.

The previous prime is 1971473850449. The next prime is 1971473850473. The reversal of 1971473850456 is 6540583741791.

It is a self number, because there is not a number n which added to its sum of digits gives 1971473850456.

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, 13213546 + ... + 13361913.

It is an arithmetic number, because the mean of its divisors is an integer number (84310646850).

Almost surely, 2^{1971473850456} is an apocalyptic number.

It is an amenable number.

1971473850456 is an abundant number, since it is smaller than the sum of its proper divisors (3424407547944).

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

1971473850456 is a wasteful number, since it uses less digits than its factorization.

1971473850456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26575760 (or 26575756 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 60.

The spelling of 1971473850456 in words is "one trillion, nine hundred seventy-one billion, four hundred seventy-three million, eight hundred fifty thousand, four hundred fifty-six".