7634643764261 has 2 divisors, whose sum is σ = 7634643764262. Its totient is φ = 7634643764260.

The previous prime is 7634643764257. The next prime is 7634643764311. The reversal of 7634643764261 is 1624673464367.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7554664530625 + 79979233636 = 2748575^2 + 282806^2 .

It is a cyclic number.

It is not a de Polignac number, because 7634643764261 - 2² = 7634643764257 is a prime.

It is a super-2 number, since 2×7634643764261² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7634643764261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7634643764201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3817321882130 + 3817321882131.

It is an arithmetic number, because the mean of its divisors is an integer number (3817321882131).

Almost surely, 2^{7634643764261} is an apocalyptic number.

It is an amenable number.

7634643764261 is a deficient number, since it is larger than the sum of its proper divisors (1).

7634643764261 is an equidigital number, since it uses as much as digits as its factorization.

7634643764261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73156608, while the sum is 59.

The spelling of 7634643764261 in words is "seven trillion, six hundred thirty-four billion, six hundred forty-three million, seven hundred sixty-four thousand, two hundred sixty-one".