4391995651 has 2 divisors, whose sum is σ = 4391995652. Its totient is φ = 4391995650.

The previous prime is 4391995631. The next prime is 4391995667. The reversal of 4391995651 is 1565991934.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4391995651 - 2²³ = 4383607043 is a prime.

It is not a weakly prime, because it can be changed into another prime (4391995631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2195997825 + 2195997826.

It is an arithmetic number, because the mean of its divisors is an integer number (2195997826).

Almost surely, 2^4391995651 is an apocalyptic number.

4391995651 is a deficient number, since it is larger than the sum of its proper divisors (1).

4391995651 is an equidigital number, since it uses as much as digits as its factorization.

4391995651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1312200, while the sum is 52.

The square root of 4391995651 is about 66272.1332914521. The cubic root of 4391995651 is about 1637.6482814734.

The spelling of 4391995651 in words is "four billion, three hundred ninety-one million, nine hundred ninety-five thousand, six hundred fifty-one".