78961104653 has 2 divisors, whose sum is σ = 78961104654. Its totient is φ = 78961104652.

The previous prime is 78961104601. The next prime is 78961104667. The reversal of 78961104653 is 35640116987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77875599844 + 1085504809 = 279062^2 + 32947^2 .

It is a cyclic number.

It is not a de Polignac number, because 78961104653 - 2³⁰ = 77887362829 is a prime.

It is a super-3 number, since 3×78961104653³ (a number of 34 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78961104353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39480552326 + 39480552327.

It is an arithmetic number, because the mean of its divisors is an integer number (39480552327).

Almost surely, 2^78961104653 is an apocalyptic number.

It is an amenable number.

78961104653 is a deficient number, since it is larger than the sum of its proper divisors (1).

78961104653 is an equidigital number, since it uses as much as digits as its factorization.

78961104653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 78961104653 in words is "seventy-eight billion, nine hundred sixty-one million, one hundred four thousand, six hundred fifty-three".