78798660077411 has 4 divisors (see below), whose sum is σ = 78981487595424. Its totient is φ = 78615832559400.

The previous prime is 78798660077351. The next prime is 78798660077531. The reversal of 78798660077411 is 11477006689787.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78798660077411 is a prime.

It is a super-2 number, since 2×78798660077411² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78798660070411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91413758360 + ... + 91413759221.

It is an arithmetic number, because the mean of its divisors is an integer number (19745371898856).

Almost surely, 2^{78798660077411} is an apocalyptic number.

78798660077411 is a deficient number, since it is larger than the sum of its proper divisors (182827518013).

78798660077411 is a wasteful number, since it uses less digits than its factorization.

78798660077411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182827518012.

The product of its (nonzero) digits is 199148544, while the sum is 71.

The spelling of 78798660077411 in words is "seventy-eight trillion, seven hundred ninety-eight billion, six hundred sixty million, seventy-seven thousand, four hundred eleven".