78518525903 has 2 divisors, whose sum is σ = 78518525904. Its totient is φ = 78518525902.

The previous prime is 78518525857. The next prime is 78518525927. The reversal of 78518525903 is 30952581587.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78518525903 - 2³⁴ = 61338656719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78518525983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39259262951 + 39259262952.

It is an arithmetic number, because the mean of its divisors is an integer number (39259262952).

Almost surely, 2^78518525903 is an apocalyptic number.

78518525903 is a deficient number, since it is larger than the sum of its proper divisors (1).

78518525903 is an equidigital number, since it uses as much as digits as its factorization.

78518525903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024000, while the sum is 53.

The spelling of 78518525903 in words is "seventy-eight billion, five hundred eighteen million, five hundred twenty-five thousand, nine hundred three".