1620413635 has 16 divisors (see below), whose sum is σ = 1974435840. Its totient is φ = 1276460640.

The previous prime is 1620413621. The next prime is 1620413647. The reversal of 1620413635 is 5363140261.

It is not a de Polignac number, because 1620413635 - 2⁷ = 1620413507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1620413597 and 1620413606.

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 15 ways as a sum of consecutive naturals, for example, 145930 + ... + 156640.

It is an arithmetic number, because the mean of its divisors is an integer number (123402240).

Almost surely, 2^1620413635 is an apocalyptic number.

1620413635 is a deficient number, since it is larger than the sum of its proper divisors (354022205).

1620413635 is a wasteful number, since it uses less digits than its factorization.

1620413635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11178.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 1620413635 is about 40254.3616891387. The cubic root of 1620413635 is about 1174.5602422565.

Adding to 1620413635 its reverse (5363140261), we get a palindrome (6983553896).

The spelling of 1620413635 in words is "one billion, six hundred twenty million, four hundred thirteen thousand, six hundred thirty-five".