1909798172352 has 84 divisors (see below), whose sum is σ = 6256104740496. Its totient is φ = 545656619520.

The previous prime is 1909798172341. The next prime is 1909798172413. The reversal of 1909798172352 is 2532718979091.

1909798172352 is a `hidden beast` number, since 190 + 9 + 7 + 98 + 1 + 7 + 2 + 352 = 666.

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 1909798172352.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 236826099 + ... + 236834162.

Almost surely, 2^{1909798172352} is an apocalyptic number.

1909798172352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1909798172352 is an abundant number, since it is smaller than the sum of its proper divisors (4346306568144).

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

1909798172352 is a wasteful number, since it uses less digits than its factorization.

1909798172352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473660286 (or 473660273 counting only the distinct ones).

The product of its (nonzero) digits is 17146080, while the sum is 63.

The spelling of 1909798172352 in words is "one trillion, nine hundred nine billion, seven hundred ninety-eight million, one hundred seventy-two thousand, three hundred fifty-two".