7721453801 has 2 divisors, whose sum is σ = 7721453802. Its totient is φ = 7721453800.

The previous prime is 7721453639. The next prime is 7721453807. The reversal of 7721453801 is 1083541277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7323251776 + 398202025 = 85576^2 + 19955^2 .

It is a cyclic number.

It is not a de Polignac number, because 7721453801 - 2¹⁸ = 7721191657 is a prime.

It is not a weakly prime, because it can be changed into another prime (7721453807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3860726900 + 3860726901.

It is an arithmetic number, because the mean of its divisors is an integer number (3860726901).

Almost surely, 2^7721453801 is an apocalyptic number.

It is an amenable number.

7721453801 is a deficient number, since it is larger than the sum of its proper divisors (1).

7721453801 is an equidigital number, since it uses as much as digits as its factorization.

7721453801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 7721453801 is about 87871.8032192352. The cubic root of 7721453801 is about 1976.5130786988.

The spelling of 7721453801 in words is "seven billion, seven hundred twenty-one million, four hundred fifty-three thousand, eight hundred one".