1996461561 has 8 divisors (see below), whose sum is σ = 2662225920. Its totient is φ = 1330835792.

The previous prime is 1996461557. The next prime is 1996461601. The reversal of 1996461561 is 1651646991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1996461561 - 2² = 1996461557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1996461561.

It is not an unprimeable number, because it can be changed into a prime (1996461541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5671 + ... + 63443.

It is an arithmetic number, because the mean of its divisors is an integer number (332778240).

Almost surely, 2^1996461561 is an apocalyptic number.

It is an amenable number.

1996461561 is a deficient number, since it is larger than the sum of its proper divisors (665764359).

1996461561 is a wasteful number, since it uses less digits than its factorization.

1996461561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69295.

The product of its digits is 349920, while the sum is 48.

The square root of 1996461561 is about 44681.7810858072. The cubic root of 1996461561 is about 1259.1775856419.

The spelling of 1996461561 in words is "one billion, nine hundred ninety-six million, four hundred sixty-one thousand, five hundred sixty-one".