1605516552 has 48 divisors (see below), whose sum is σ = 4509326640. Its totient is φ = 535171536.

The previous prime is 1605516509. The next prime is 1605516713. The reversal of 1605516552 is 2556155061.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 410998 + ... + 414885.

It is an arithmetic number, because the mean of its divisors is an integer number (93944305).

Almost surely, 2^1605516552 is an apocalyptic number.

1605516552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1605516552 is an abundant number, since it is smaller than the sum of its proper divisors (2903810088).

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

1605516552 is an equidigital number, since it uses as much as digits as its factorization.

1605516552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825904 (or 825888 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 1605516552 is about 40068.8975640708. The cubic root of 1605516552 is about 1170.9497613557.

The spelling of 1605516552 in words is "one billion, six hundred five million, five hundred sixteen thousand, five hundred fifty-two".