7872411649 has 2 divisors, whose sum is σ = 7872411650. Its totient is φ = 7872411648.

The previous prime is 7872411571. The next prime is 7872411661. The reversal of 7872411649 is 9461142787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7760729025 + 111682624 = 88095^2 + 10568^2 .

It is a cyclic number.

It is not a de Polignac number, because 7872411649 - 2²⁷ = 7738193921 is a prime.

It is not a weakly prime, because it can be changed into another prime (7872411689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3936205824 + 3936205825.

It is an arithmetic number, because the mean of its divisors is an integer number (3936205825).

Almost surely, 2^7872411649 is an apocalyptic number.

It is an amenable number.

7872411649 is a deficient number, since it is larger than the sum of its proper divisors (1).

7872411649 is an equidigital number, since it uses as much as digits as its factorization.

7872411649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 49.

The square root of 7872411649 is about 88726.6118422201. The cubic root of 7872411649 is about 1989.3106076458.

The spelling of 7872411649 in words is "seven billion, eight hundred seventy-two million, four hundred eleven thousand, six hundred forty-nine".