7919061643 has 2 divisors, whose sum is σ = 7919061644. Its totient is φ = 7919061642.

The previous prime is 7919061617. The next prime is 7919061653. The reversal of 7919061643 is 3461609197.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3461609197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7919061643 - 2²⁵ = 7885507211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7919061593 and 7919061602.

It is not a weakly prime, because it can be changed into another prime (7919061613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3959530821 + 3959530822.

It is an arithmetic number, because the mean of its divisors is an integer number (3959530822).

Almost surely, 2^7919061643 is an apocalyptic number.

7919061643 is a deficient number, since it is larger than the sum of its proper divisors (1).

7919061643 is an equidigital number, since it uses as much as digits as its factorization.

7919061643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 7919061643 is about 88989.1096876466. The cubic root of 7919061643 is about 1993.2322616067.

The spelling of 7919061643 in words is "seven billion, nine hundred nineteen million, sixty-one thousand, six hundred forty-three".