1620144435 has 64 divisors (see below), whose sum is σ = 3203278848. Its totient is φ = 680914944.

The previous prime is 1620144391. The next prime is 1620144443. The reversal of 1620144435 is 5344410261.

It is not a de Polignac number, because 1620144435 - 2⁸ = 1620144179 is a prime.

It is a super-2 number, since 2×1620144435² = 5249735980522938450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 356739 + ... + 361251.

It is an arithmetic number, because the mean of its divisors is an integer number (50051232).

Almost surely, 2^1620144435 is an apocalyptic number.

1620144435 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1620144435 is a deficient number, since it is larger than the sum of its proper divisors (1583134413).

1620144435 is a wasteful number, since it uses less digits than its factorization.

1620144435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4804.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1620144435 is about 40251.0178132181. The cubic root of 1620144435 is about 1174.4951952583.

Adding to 1620144435 its reverse (5344410261), we get a palindrome (6964554696).

The spelling of 1620144435 in words is "one billion, six hundred twenty million, one hundred forty-four thousand, four hundred thirty-five".