7643375991361 has 16 divisors (see below), whose sum is σ = 8834626101888. Its totient is φ = 6535406406400.

The previous prime is 7643375991311. The next prime is 7643375991397. The reversal of 7643375991361 is 1631995733467.

It is a cyclic number.

It is not a de Polignac number, because 7643375991361 - 2⁹ = 7643375990849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7643375991293 and 7643375991302.

It is not an unprimeable number, because it can be changed into a prime (7643375991311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13409245 + ... + 13967626.

It is an arithmetic number, because the mean of its divisors is an integer number (552164131368).

Almost surely, 2^{7643375991361} is an apocalyptic number.

It is an amenable number.

7643375991361 is a deficient number, since it is larger than the sum of its proper divisors (1191250110527).

7643375991361 is a wasteful number, since it uses less digits than its factorization.

7643375991361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27378392.

The product of its digits is 77157360, while the sum is 64.

The spelling of 7643375991361 in words is "seven trillion, six hundred forty-three billion, three hundred seventy-five million, nine hundred ninety-one thousand, three hundred sixty-one".