1497891817912 has 32 divisors (see below), whose sum is σ = 3230212583520. Its totient is φ = 637864755840.

The previous prime is 1497891817909. The next prime is 1497891817921. The reversal of 1497891817912 is 2197181987941.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85176139 + ... + 85193722.

It is an arithmetic number, because the mean of its divisors is an integer number (100944143235).

Almost surely, 2^{1497891817912} is an apocalyptic number.

It is an amenable number.

1497891817912 is an abundant number, since it is smaller than the sum of its proper divisors (1732320765608).

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

1497891817912 is a wasteful number, since it uses less digits than its factorization.

1497891817912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170370031 (or 170370027 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 67.

The spelling of 1497891817912 in words is "one trillion, four hundred ninety-seven billion, eight hundred ninety-one million, eight hundred seventeen thousand, nine hundred twelve".