1620828590813 has 8 divisors (see below), whose sum is σ = 1662827291328. Its totient is φ = 1579364905824.

The previous prime is 1620828590791. The next prime is 1620828590893. The reversal of 1620828590813 is 3180958280261.

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 1620828590813 - 2²⁴ = 1620811813597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620828590893) 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, 133747745 + ... + 133759862.

It is an arithmetic number, because the mean of its divisors is an integer number (207853411416).

Almost surely, 2^{1620828590813} is an apocalyptic number.

It is an amenable number.

1620828590813 is a deficient number, since it is larger than the sum of its proper divisors (41998700515).

1620828590813 is an equidigital number, since it uses as much as digits as its factorization.

1620828590813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267507763.

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 1620828590813 in words is "one trillion, six hundred twenty billion, eight hundred twenty-eight million, five hundred ninety thousand, eight hundred thirteen".