7442400649 has 2 divisors, whose sum is σ = 7442400650. Its totient is φ = 7442400648.

The previous prime is 7442400619. The next prime is 7442400677. The reversal of 7442400649 is 9460042447.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6737126400 + 705274249 = 82080^2 + 26557^2 .

It is a cyclic number.

It is not a de Polignac number, because 7442400649 - 2⁷ = 7442400521 is a prime.

It is not a weakly prime, because it can be changed into another prime (7442400619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3721200324 + 3721200325.

It is an arithmetic number, because the mean of its divisors is an integer number (3721200325).

Almost surely, 2^7442400649 is an apocalyptic number.

It is an amenable number.

7442400649 is a deficient number, since it is larger than the sum of its proper divisors (1).

7442400649 is an equidigital number, since it uses as much as digits as its factorization.

7442400649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 7442400649 is about 86269.3494179712. The cubic root of 7442400649 is about 1952.4099635018.

The spelling of 7442400649 in words is "seven billion, four hundred forty-two million, four hundred thousand, six hundred forty-nine".