78400882614913 has 2 divisors, whose sum is σ = 78400882614914. Its totient is φ = 78400882614912.

The previous prime is 78400882614827. The next prime is 78400882614947. The reversal of 78400882614913 is 31941628800487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48358282896144 + 30042599718769 = 6954012^2 + 5481113^2 .

It is a cyclic number.

It is not a de Polignac number, because 78400882614913 - 2²¹ = 78400880517761 is a prime.

It is a super-2 number, since 2×78400882614913² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78400882114913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39200441307456 + 39200441307457.

It is an arithmetic number, because the mean of its divisors is an integer number (39200441307457).

Almost surely, 2^{78400882614913} is an apocalyptic number.

It is an amenable number.

78400882614913 is a deficient number, since it is larger than the sum of its proper divisors (1).

78400882614913 is an equidigital number, since it uses as much as digits as its factorization.

78400882614913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18579456, while the sum is 61.

The spelling of 78400882614913 in words is "seventy-eight trillion, four hundred billion, eight hundred eighty-two million, six hundred fourteen thousand, nine hundred thirteen".