7657122401 has 2 divisors, whose sum is σ = 7657122402. Its totient is φ = 7657122400.

The previous prime is 7657122397. The next prime is 7657122427. The reversal of 7657122401 is 1042217567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6615382225 + 1041740176 = 81335^2 + 32276^2 .

It is a cyclic number.

It is not a de Polignac number, because 7657122401 - 2² = 7657122397 is a prime.

It is not a weakly prime, because it can be changed into another prime (7657122461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3828561200 + 3828561201.

It is an arithmetic number, because the mean of its divisors is an integer number (3828561201).

Almost surely, 2^7657122401 is an apocalyptic number.

It is an amenable number.

7657122401 is a deficient number, since it is larger than the sum of its proper divisors (1).

7657122401 is an equidigital number, since it uses as much as digits as its factorization.

7657122401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 7657122401 is about 87504.9850065698. The cubic root of 7657122401 is about 1971.0086481066.

Adding to 7657122401 its reverse (1042217567), we get a palindrome (8699339968).

The spelling of 7657122401 in words is "seven billion, six hundred fifty-seven million, one hundred twenty-two thousand, four hundred one".