1651661352 has 192 divisors, whose sum is σ = 5057769600. Its totient is φ = 482526720.

The previous prime is 1651661339. The next prime is 1651661353. The reversal of 1651661352 is 2531661561.

1651661352 is a `hidden beast` number, since 1 + 6 + 516 + 6 + 135 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (1651661353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4600549 + ... + 4600907.

It is an arithmetic number, because the mean of its divisors is an integer number (26342550).

Almost surely, 2^1651661352 is an apocalyptic number.

1651661352 is a gapful number since it is divisible by the number (12) 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 1651661352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2528884800).

1651661352 is an abundant number, since it is smaller than the sum of its proper divisors (3406108248).

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

1651661352 is a wasteful number, since it uses less digits than its factorization.

1651661352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576 (or 569 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 1651661352 is about 40640.6367076108. The cubic root of 1651661352 is about 1182.0622159698.

The spelling of 1651661352 in words is "one billion, six hundred fifty-one million, six hundred sixty-one thousand, three hundred fifty-two".