1921486704472 has 8 divisors (see below), whose sum is σ = 3602787570900. Its totient is φ = 960743352232.

The previous prime is 1921486704419. The next prime is 1921486704481. The reversal of 1921486704472 is 2744076841291.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1921486704472² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120092919022 + ... + 120092919037.

Almost surely, 2^{1921486704472} is an apocalyptic number.

It is an amenable number.

1921486704472 is a deficient number, since it is larger than the sum of its proper divisors (1681300866428).

1921486704472 is a wasteful number, since it uses less digits than its factorization.

1921486704472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240185838065 (or 240185838061 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 55.

The spelling of 1921486704472 in words is "one trillion, nine hundred twenty-one billion, four hundred eighty-six million, seven hundred four thousand, four hundred seventy-two".