78153696953 has 2 divisors, whose sum is σ = 78153696954. Its totient is φ = 78153696952.

The previous prime is 78153696919. The next prime is 78153696979. The reversal of 78153696953 is 35969635187.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76080533929 + 2073163024 = 275827^2 + 45532^2 .

It is a cyclic number.

It is not a de Polignac number, because 78153696953 - 2¹⁰ = 78153695929 is a prime.

It is a super-2 number, since 2×78153696953² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78153696853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39076848476 + 39076848477.

It is an arithmetic number, because the mean of its divisors is an integer number (39076848477).

Almost surely, 2^78153696953 is an apocalyptic number.

It is an amenable number.

78153696953 is a deficient number, since it is larger than the sum of its proper divisors (1).

78153696953 is an equidigital number, since it uses as much as digits as its factorization.

78153696953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36741600, while the sum is 62.

The spelling of 78153696953 in words is "seventy-eight billion, one hundred fifty-three million, six hundred ninety-six thousand, nine hundred fifty-three".