78507876803 has 2 divisors, whose sum is σ = 78507876804. Its totient is φ = 78507876802.

The previous prime is 78507876787. The next prime is 78507876829. The reversal of 78507876803 is 30867870587.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78507876803 - 2⁴ = 78507876787 is a prime.

It is not a weakly prime, because it can be changed into another prime (78507876703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39253938401 + 39253938402.

It is an arithmetic number, because the mean of its divisors is an integer number (39253938402).

Almost surely, 2^78507876803 is an apocalyptic number.

78507876803 is a deficient number, since it is larger than the sum of its proper divisors (1).

78507876803 is an equidigital number, since it uses as much as digits as its factorization.

78507876803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15805440, while the sum is 59.

The spelling of 78507876803 in words is "seventy-eight billion, five hundred seven million, eight hundred seventy-six thousand, eight hundred three".