1916623606572 has 18 divisors (see below), whose sum is σ = 4844798561148. Its totient is φ = 638874535512.

The previous prime is 1916623606561. The next prime is 1916623606589. The reversal of 1916623606572 is 2756063266191.

1916623606572 is a `hidden beast` number, since 1 + 9 + 1 + 6 + 6 + 2 + 3 + 60 + 6 + 572 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26619772278 + ... + 26619772349.

Almost surely, 2^{1916623606572} is an apocalyptic number.

1916623606572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1916623606572 is an abundant number, since it is smaller than the sum of its proper divisors (2928174954576).

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

1916623606572 is a wasteful number, since it uses less digits than its factorization.

1916623606572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53239544637 (or 53239544632 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 1916623606572 in words is "one trillion, nine hundred sixteen billion, six hundred twenty-three million, six hundred six thousand, five hundred seventy-two".