1616566380 has 192 divisors, whose sum is σ = 5631026688. Its totient is φ = 340439040.

The previous prime is 1616566373. The next prime is 1616566403. The reversal of 1616566380 is 836656161.

It is a super-2 number, since 2×1616566380² = 5226573721892608800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 140319 + ... + 151401.

It is an arithmetic number, because the mean of its divisors is an integer number (29328264).

Almost surely, 2^1616566380 is an apocalyptic number.

1616566380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1616566380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2815513344).

1616566380 is an abundant number, since it is smaller than the sum of its proper divisors (4014460308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1616566380 is a wasteful number, since it uses less digits than its factorization.

1616566380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11136 (or 11134 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 1616566380 is about 40206.5464818853. The cubic root of 1616566380 is about 1173.6299419801.

The spelling of 1616566380 in words is "one billion, six hundred sixteen million, five hundred sixty-six thousand, three hundred eighty".