1613820057253 has 4 divisors (see below), whose sum is σ = 1622736190348. Its totient is φ = 1604903924160.

The previous prime is 1613820057247. The next prime is 1613820057263. The reversal of 1613820057253 is 3527500283161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 162040866849 + 1451779190404 = 402543^2 + 1204898^2 .

It is a cyclic number.

It is not a de Polignac number, because 1613820057253 - 2³⁷ = 1476381103781 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 (1613820057263) 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, 4458066276 + ... + 4458066637.

It is an arithmetic number, because the mean of its divisors is an integer number (405684047587).

Almost surely, 2^{1613820057253} is an apocalyptic number.

It is an amenable number.

1613820057253 is a deficient number, since it is larger than the sum of its proper divisors (8916133095).

1613820057253 is an equidigital number, since it uses as much as digits as its factorization.

1613820057253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8916133094.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 1613820057253 in words is "one trillion, six hundred thirteen billion, eight hundred twenty million, fifty-seven thousand, two hundred fifty-three".