1620684801 has 8 divisors (see below), whose sum is σ = 2401014560. Its totient is φ = 1080456516.

The previous prime is 1620684787. The next prime is 1620684803. The reversal of 1620684801 is 1084860261.

It is not a de Polignac number, because 1620684801 - 2¹⁷ = 1620553729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1620684803) 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, 30012655 + ... + 30012708.

It is an arithmetic number, because the mean of its divisors is an integer number (300126820).

Almost surely, 2^1620684801 is an apocalyptic number.

It is an amenable number.

1620684801 is a deficient number, since it is larger than the sum of its proper divisors (780329759).

1620684801 is an equidigital number, since it uses as much as digits as its factorization.

1620684801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60025372 (or 60025366 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1620684801 is about 40257.7297049896. The cubic root of 1620684801 is about 1174.6257570179.

The spelling of 1620684801 in words is "one billion, six hundred twenty million, six hundred eighty-four thousand, eight hundred one".