1613989851 has 16 divisors (see below), whose sum is σ = 2174285568. Its totient is φ = 1064901600.

The previous prime is 1613989849. The next prime is 1613989889. The reversal of 1613989851 is 1589893161.

It is not a de Polignac number, because 1613989851 - 2¹ = 1613989849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1613989794 and 1613989803.

It is not an unprimeable number, because it can be changed into a prime (1613989801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107530 + ... + 121616.

It is an arithmetic number, because the mean of its divisors is an integer number (135892848).

Almost surely, 2^1613989851 is an apocalyptic number.

1613989851 is a deficient number, since it is larger than the sum of its proper divisors (560295717).

1613989851 is a wasteful number, since it uses less digits than its factorization.

1613989851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14482.

The product of its digits is 466560, while the sum is 51.

The square root of 1613989851 is about 40174.4925419102. The cubic root of 1613989851 is about 1173.0060889454.

The spelling of 1613989851 in words is "one billion, six hundred thirteen million, nine hundred eighty-nine thousand, eight hundred fifty-one".