1620852671 has 2 divisors, whose sum is σ = 1620852672. Its totient is φ = 1620852670.

The previous prime is 1620852581. The next prime is 1620852689. The reversal of 1620852671 is 1762580261.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1620852671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1620855671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810426335 + 810426336.

It is an arithmetic number, because the mean of its divisors is an integer number (810426336).

Almost surely, 2^1620852671 is an apocalyptic number.

1620852671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620852671 is an equidigital number, since it uses as much as digits as its factorization.

1620852671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 1620852671 is about 40259.8145922209. The cubic root of 1620852671 is about 1174.6663114013. Note that the first 3 decimals are identical.

The spelling of 1620852671 in words is "one billion, six hundred twenty million, eight hundred fifty-two thousand, six hundred seventy-one".