1620791533201 has 8 divisors (see below), whose sum is σ = 1665007773824. Its totient is φ = 1576596927600.

The previous prime is 1620791533147. The next prime is 1620791533217. The reversal of 1620791533201 is 1023351970261.

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 1620791533201 - 2¹⁹ = 1620791008913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1620791533301) 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, 5256825 + ... + 5556598.

It is an arithmetic number, because the mean of its divisors is an integer number (208125971728).

Almost surely, 2^{1620791533201} is an apocalyptic number.

It is an amenable number.

1620791533201 is a deficient number, since it is larger than the sum of its proper divisors (44216240623).

1620791533201 is a wasteful number, since it uses less digits than its factorization.

1620791533201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10817511.

The product of its (nonzero) digits is 68040, while the sum is 40.

The spelling of 1620791533201 in words is "one trillion, six hundred twenty billion, seven hundred ninety-one million, five hundred thirty-three thousand, two hundred one".