1616567398 has 4 divisors (see below), whose sum is σ = 2424851100. Its totient is φ = 808283698.

The previous prime is 1616567347. The next prime is 1616567399. The reversal of 1616567398 is 8937656161.

It is a happy number.

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

It is a super-2 number, since 2×1616567398² = 5226580304552980808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616567399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404141848 + ... + 404141851.

It is an arithmetic number, because the mean of its divisors is an integer number (606212775).

Almost surely, 2^1616567398 is an apocalyptic number.

1616567398 is a deficient number, since it is larger than the sum of its proper divisors (808283702).

1616567398 is an equidigital number, since it uses as much as digits as its factorization.

1616567398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808283701.

The product of its digits is 1632960, while the sum is 52.

The square root of 1616567398 is about 40206.5591415132. The cubic root of 1616567398 is about 1173.6301883366.

The spelling of 1616567398 in words is "one billion, six hundred sixteen million, five hundred sixty-seven thousand, three hundred ninety-eight".