1616381459 has 8 divisors (see below), whose sum is σ = 2015228928. Its totient is φ = 1259517960.

The previous prime is 1616381449. The next prime is 1616381461. The reversal of 1616381459 is 9541836161.

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 1616381459 - 2¹² = 1616377363 is a prime.

It is a super-2 number, since 2×1616381459² = 5225378041997937362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1616381449) 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, 10495907 + ... + 10496060.

It is an arithmetic number, because the mean of its divisors is an integer number (251903616).

Almost surely, 2^1616381459 is an apocalyptic number.

1616381459 is a deficient number, since it is larger than the sum of its proper divisors (398847469).

1616381459 is a wasteful number, since it uses less digits than its factorization.

1616381459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20991985.

The product of its digits is 155520, while the sum is 44.

The square root of 1616381459 is about 40204.2467781701. The cubic root of 1616381459 is about 1173.5851892867.

The spelling of 1616381459 in words is "one billion, six hundred sixteen million, three hundred eighty-one thousand, four hundred fifty-nine".