1620962752161 has 4 divisors (see below), whose sum is σ = 2161283669552. Its totient is φ = 1080641834772.

The previous prime is 1620962752117. The next prime is 1620962752301. The reversal of 1620962752161 is 1612572690261.

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 not a de Polignac number, because 1620962752161 - 2¹³ = 1620962743969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1620962752161.

It is not an unprimeable number, because it can be changed into a prime (1620962752061) 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, 270160458691 + ... + 270160458696.

It is an arithmetic number, because the mean of its divisors is an integer number (540320917388).

Almost surely, 2^{1620962752161} is an apocalyptic number.

It is an amenable number.

1620962752161 is a deficient number, since it is larger than the sum of its proper divisors (540320917391).

1620962752161 is an equidigital number, since it uses as much as digits as its factorization.

1620962752161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540320917390.

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 1620962752161 in words is "one trillion, six hundred twenty billion, nine hundred sixty-two million, seven hundred fifty-two thousand, one hundred sixty-one".