1620414342605 has 8 divisors (see below), whose sum is σ = 1950267234552. Its totient is φ = 1292484791808.

The previous prime is 1620414342601. The next prime is 1620414342643. The reversal of 1620414342605 is 5062434140261.

It can be written as a sum of positive squares in 4 ways, for example, as 207554047561 + 1412860295044 = 455581^2 + 1188638^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1620414342605 - 2² = 1620414342601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620414342601) 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, 480833432 + ... + 480836801.

It is an arithmetic number, because the mean of its divisors is an integer number (243783404319).

Almost surely, 2^{1620414342605} is an apocalyptic number.

It is an amenable number.

1620414342605 is a deficient number, since it is larger than the sum of its proper divisors (329852891947).

1620414342605 is an equidigital number, since it uses as much as digits as its factorization.

1620414342605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961670575.

The product of its (nonzero) digits is 138240, while the sum is 38.

Adding to 1620414342605 its reverse (5062434140261), we get a palindrome (6682848482866).

The spelling of 1620414342605 in words is "one trillion, six hundred twenty billion, four hundred fourteen million, three hundred forty-two thousand, six hundred five".