1651685952 has 224 divisors, whose sum is σ = 5337169920. Its totient is φ = 440616960.

The previous prime is 1651685947. The next prime is 1651685953. The reversal of 1651685952 is 2595861561.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1651685953) 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 31 ways as a sum of consecutive naturals, for example, 1207573 + ... + 1208939.

Almost surely, 2^1651685952 is an apocalyptic number.

1651685952 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 1651685952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2668584960).

1651685952 is an abundant number, since it is smaller than the sum of its proper divisors (3685483968).

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

1651685952 is a wasteful number, since it uses less digits than its factorization.

1651685952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1449 (or 1439 counting only the distinct ones).

The product of its digits is 648000, while the sum is 48.

The square root of 1651685952 is about 40640.9393592225. The cubic root of 1651685952 is about 1182.0680845227.

The spelling of 1651685952 in words is "one billion, six hundred fifty-one million, six hundred eighty-five thousand, nine hundred fifty-two".