1620533622313 has 4 divisors (see below), whose sum is σ = 1620739203408. Its totient is φ = 1620328041220.

The previous prime is 1620533622307. The next prime is 1620533622413. The reversal of 1620533622313 is 3132263350261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1620533622313 - 2²⁵ = 1620500067881 is a prime.

It is a super-2 number, since 2×1620533622313² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1620533622413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102778723 + ... + 102794488.

It is an arithmetic number, because the mean of its divisors is an integer number (405184800852).

Almost surely, 2^{1620533622313} is an apocalyptic number.

It is an amenable number.

1620533622313 is a deficient number, since it is larger than the sum of its proper divisors (205581095).

1620533622313 is an equidigital number, since it uses as much as digits as its factorization.

1620533622313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205581094.

The product of its (nonzero) digits is 116640, while the sum is 37.

Adding to 1620533622313 its reverse (3132263350261), we get a palindrome (4752796972574).

The spelling of 1620533622313 in words is "one trillion, six hundred twenty billion, five hundred thirty-three million, six hundred twenty-two thousand, three hundred thirteen".