7643251655251 has 2 divisors, whose sum is σ = 7643251655252. Its totient is φ = 7643251655250.

The previous prime is 7643251655213. The next prime is 7643251655261. The reversal of 7643251655251 is 1525561523467.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7643251655251 - 2²⁹ = 7642714784339 is a prime.

It is not a weakly prime, because it can be changed into another prime (7643251655261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3821625827625 + 3821625827626.

It is an arithmetic number, because the mean of its divisors is an integer number (3821625827626).

Almost surely, 2^{7643251655251} is an apocalyptic number.

7643251655251 is a deficient number, since it is larger than the sum of its proper divisors (1).

7643251655251 is an equidigital number, since it uses as much as digits as its factorization.

7643251655251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560000, while the sum is 52.

The spelling of 7643251655251 in words is "seven trillion, six hundred forty-three billion, two hundred fifty-one million, six hundred fifty-five thousand, two hundred fifty-one".