1620611235635 has 16 divisors (see below), whose sum is σ = 2226074852352. Its totient is φ = 1109515125600.

The previous prime is 1620611235613. The next prime is 1620611235643. The reversal of 1620611235635 is 5365321160261.

It is not a de Polignac number, because 1620611235635 - 2¹⁶ = 1620611170099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1620611235592 and 1620611235601.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36668231 + ... + 36712400.

It is an arithmetic number, because the mean of its divisors is an integer number (139129678272).

Almost surely, 2^{1620611235635} is an apocalyptic number.

1620611235635 is a deficient number, since it is larger than the sum of its proper divisors (605463616717).

1620611235635 is an equidigital number, since it uses as much as digits as its factorization.

1620611235635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73381274.

The product of its (nonzero) digits is 194400, while the sum is 41.

Adding to 1620611235635 its reverse (5365321160261), we get a palindrome (6985932395896).

The spelling of 1620611235635 in words is "one trillion, six hundred twenty billion, six hundred eleven million, two hundred thirty-five thousand, six hundred thirty-five".