1620453465401 has 8 divisors (see below), whose sum is σ = 1632936630720. Its totient is φ = 1608006120912.

The previous prime is 1620453465349. The next prime is 1620453465427. The reversal of 1620453465401 is 1045643540261.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1620453465401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1620453465461) 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, 8864381 + ... + 9045338.

It is an arithmetic number, because the mean of its divisors is an integer number (204117078840).

Almost surely, 2^{1620453465401} is an apocalyptic number.

It is an amenable number.

1620453465401 is a deficient number, since it is larger than the sum of its proper divisors (12483165319).

1620453465401 is a wasteful number, since it uses less digits than its factorization.

1620453465401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17910415.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 1620453465401 in words is "one trillion, six hundred twenty billion, four hundred fifty-three million, four hundred sixty-five thousand, four hundred one".