78881463636253 has 2 divisors, whose sum is σ = 78881463636254. Its totient is φ = 78881463636252.

The previous prime is 78881463636211. The next prime is 78881463636259. The reversal of 78881463636253 is 35263636418887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60637400148004 + 18244063488249 = 7787002^2 + 4271307^2 .

It is a cyclic number.

It is not a de Polignac number, because 78881463636253 - 2²⁹ = 78880926765341 is a prime.

It is a super-2 number, since 2×78881463636253² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78881463636259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39440731818126 + 39440731818127.

It is an arithmetic number, because the mean of its divisors is an integer number (39440731818127).

Almost surely, 2^{78881463636253} is an apocalyptic number.

It is an amenable number.

78881463636253 is a deficient number, since it is larger than the sum of its proper divisors (1).

78881463636253 is an equidigital number, since it uses as much as digits as its factorization.

78881463636253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 836075520, while the sum is 70.

The spelling of 78881463636253 in words is "seventy-eight trillion, eight hundred eighty-one billion, four hundred sixty-three million, six hundred thirty-six thousand, two hundred fifty-three".