1972745666500 has 48 divisors (see below), whose sum is σ = 4923973192320. Its totient is φ = 676369941600.

The previous prime is 1972745666477. The next prime is 1972745666519. The reversal of 1972745666500 is 56665472791.

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, 281817310 + ... + 281824309.

It is an arithmetic number, because the mean of its divisors is an integer number (102582774840).

Almost surely, 2^{1972745666500} is an apocalyptic number.

1972745666500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1972745666500 is an abundant number, since it is smaller than the sum of its proper divisors (2951227525820).

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

1972745666500 is a wasteful number, since it uses less digits than its factorization.

1972745666500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563641645 (or 563641633 counting only the distinct ones).

The product of its (nonzero) digits is 19051200, while the sum is 58.

The spelling of 1972745666500 in words is "one trillion, nine hundred seventy-two billion, seven hundred forty-five million, six hundred sixty-six thousand, five hundred".