4051489961 has 4 divisors (see below), whose sum is σ = 4058610900. Its totient is φ = 4044369024.

The previous prime is 4051489943. The next prime is 4051489991. The reversal of 4051489961 is 1699841504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 622801936 + 3428688025 = 24956^2 + 58555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4051489961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4051489991) 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, 3559616 + ... + 3560753.

It is an arithmetic number, because the mean of its divisors is an integer number (1014652725).

Almost surely, 2^4051489961 is an apocalyptic number.

It is an amenable number.

4051489961 is a deficient number, since it is larger than the sum of its proper divisors (7120939).

4051489961 is an equidigital number, since it uses as much as digits as its factorization.

4051489961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7120938.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 4051489961 is about 63651.3154695172. The cubic root of 4051489961 is about 1594.1833013913.

The spelling of 4051489961 in words is "four billion, fifty-one million, four hundred eighty-nine thousand, nine hundred sixty-one".