1616661552 has 40 divisors (see below), whose sum is σ = 4556047680. Its totient is φ = 489897280.

The previous prime is 1616661523. The next prime is 1616661581. The reversal of 1616661552 is 2551666161.

It is an interprime number because it is at equal distance from previous prime (1616661523) and next prime (1616661581).

It is a super-2 number, since 2×1616661552² = 5227189147430097408, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1616661552.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1530402 + ... + 1531457.

It is an arithmetic number, because the mean of its divisors is an integer number (113901192).

Almost surely, 2^1616661552 is an apocalyptic number.

1616661552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1616661552 is an abundant number, since it is smaller than the sum of its proper divisors (2939386128).

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

1616661552 is a wasteful number, since it uses less digits than its factorization.

1616661552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3061881 (or 3061875 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 1616661552 is about 40207.7300030728. The cubic root of 1616661552 is about 1173.6529732061.

The spelling of 1616661552 in words is "one billion, six hundred sixteen million, six hundred sixty-one thousand, five hundred fifty-two".