1972162164540 has 96 divisors (see below), whose sum is σ = 6000194672640. Its totient is φ = 482158483200.

The previous prime is 1972162164473. The next prime is 1972162164589. The reversal of 1972162164540 is 454612612791.

It is a self number, because there is not a number n which added to its sum of digits gives 1972162164540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27867351 + ... + 27938030.

It is an arithmetic number, because the mean of its divisors is an integer number (62502027840).

Almost surely, 2^{1972162164540} is an apocalyptic number.

1972162164540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1972162164540 is an abundant number, since it is smaller than the sum of its proper divisors (4028032508100).

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

1972162164540 is a wasteful number, since it uses less digits than its factorization.

1972162164540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55805443 (or 55805441 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 1972162164540 in words is "one trillion, nine hundred seventy-two billion, one hundred sixty-two million, one hundred sixty-four thousand, five hundred forty".