1616643460 has 24 divisors (see below), whose sum is σ = 3400258176. Its totient is φ = 645646560.

The previous prime is 1616643449. The next prime is 1616643487. The reversal of 1616643460 is 643466161.

It is a super-2 number, since 2×1616643460² = 5227072153521543200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49996 + ... + 75715.

It is an arithmetic number, because the mean of its divisors is an integer number (141677424).

Almost surely, 2^1616643460 is an apocalyptic number.

1616643460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1616643460 is an abundant number, since it is smaller than the sum of its proper divisors (1783614716).

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

1616643460 is a wasteful number, since it uses less digits than its factorization.

1616643460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126363 (or 126361 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 1616643460 is about 40207.5050208291. The cubic root of 1616643460 is about 1173.6485950873.

The spelling of 1616643460 in words is "one billion, six hundred sixteen million, six hundred forty-three thousand, four hundred sixty".