1921670604563 has 8 divisors (see below), whose sum is σ = 1923560700048. Its totient is φ = 1919780763264.

The previous prime is 1921670604547. The next prime is 1921670604569. The reversal of 1921670604563 is 3654060761291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1921670604563 - 2⁴ = 1921670604547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1921670604569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17401520 + ... + 17511602.

It is an arithmetic number, because the mean of its divisors is an integer number (240445087506).

Almost surely, 2^{1921670604563} is an apocalyptic number.

1921670604563 is a deficient number, since it is larger than the sum of its proper divisors (1890095485).

1921670604563 is a wasteful number, since it uses less digits than its factorization.

1921670604563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127093.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 1921670604563 in words is "one trillion, nine hundred twenty-one billion, six hundred seventy million, six hundred four thousand, five hundred sixty-three".