4651442561 has 4 divisors (see below), whose sum is σ = 4750409472. Its totient is φ = 4552475652.

The previous prime is 4651442533. The next prime is 4651442567. The reversal of 4651442561 is 1652441564.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4651442561 - 2²² = 4647248257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4651442567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49483385 + ... + 49483478.

It is an arithmetic number, because the mean of its divisors is an integer number (1187602368).

Almost surely, 2^4651442561 is an apocalyptic number.

It is an amenable number.

4651442561 is a deficient number, since it is larger than the sum of its proper divisors (98966911).

4651442561 is an equidigital number, since it uses as much as digits as its factorization.

4651442561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98966910.

The product of its digits is 115200, while the sum is 38.

The square root of 4651442561 is about 68201.4850351515. The cubic root of 4651442561 is about 1669.2801182117.

The spelling of 4651442561 in words is "four billion, six hundred fifty-one million, four hundred forty-two thousand, five hundred sixty-one".