1620896881771 has 8 divisors (see below), whose sum is σ = 1642685617664. Its totient is φ = 1599249173760.

The previous prime is 1620896881733. The next prime is 1620896881811. The reversal of 1620896881771 is 1771886980261.

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 1620896881771 - 2⁹ = 1620896881259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1620896881711) 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, 35233830 + ... + 35279803.

It is an arithmetic number, because the mean of its divisors is an integer number (205335702208).

Almost surely, 2^{1620896881771} is an apocalyptic number.

1620896881771 is a deficient number, since it is larger than the sum of its proper divisors (21788735893).

1620896881771 is a wasteful number, since it uses less digits than its factorization.

1620896881771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70513941.

The product of its (nonzero) digits is 16257024, while the sum is 64.

The spelling of 1620896881771 in words is "one trillion, six hundred twenty billion, eight hundred ninety-six million, eight hundred eighty-one thousand, seven hundred seventy-one".