78025477913 has 2 divisors, whose sum is σ = 78025477914. Its totient is φ = 78025477912.

The previous prime is 78025477889. The next prime is 78025477961. The reversal of 78025477913 is 31977452087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68015075209 + 10010402704 = 260797^2 + 100052^2 .

It is a cyclic number.

It is not a de Polignac number, because 78025477913 - 2¹⁴ = 78025461529 is a prime.

It is not a weakly prime, because it can be changed into another prime (78025479913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39012738956 + 39012738957.

It is an arithmetic number, because the mean of its divisors is an integer number (39012738957).

Almost surely, 2^78025477913 is an apocalyptic number.

It is an amenable number.

78025477913 is a deficient number, since it is larger than the sum of its proper divisors (1).

78025477913 is an equidigital number, since it uses as much as digits as its factorization.

78025477913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2963520, while the sum is 53.

The spelling of 78025477913 in words is "seventy-eight billion, twenty-five million, four hundred seventy-seven thousand, nine hundred thirteen".