1613897851 has 8 divisors (see below), whose sum is σ = 1669367808. Its totient is φ = 1558641000.

The previous prime is 1613897849. The next prime is 1613897863. The reversal of 1613897851 is 1587983161.

It is a happy number.

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 1613897851 - 2¹ = 1613897849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1613897795 and 1613897804.

It is not an unprimeable number, because it can be changed into a prime (1613897251) 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, 37795 + ... + 68236.

It is an arithmetic number, because the mean of its divisors is an integer number (208670976).

Almost surely, 2^1613897851 is an apocalyptic number.

1613897851 is a deficient number, since it is larger than the sum of its proper divisors (55469957).

1613897851 is a wasteful number, since it uses less digits than its factorization.

1613897851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106553.

The product of its digits is 362880, while the sum is 49.

The square root of 1613897851 is about 40173.3475204644. The cubic root of 1613897851 is about 1172.9838007815.

The spelling of 1613897851 in words is "one billion, six hundred thirteen million, eight hundred ninety-seven thousand, eight hundred fifty-one".