78535478768761 has 8 divisors (see below), whose sum is σ = 89947027385280. Its totient is φ = 67171978778928.

The previous prime is 78535478768749. The next prime is 78535478768801. The reversal of 78535478768761 is 16786787453587.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78535478768761 - 2¹⁹ = 78535478244473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78535478768711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12012153166 + ... + 12012159703.

It is an arithmetic number, because the mean of its divisors is an integer number (11243378423160).

Almost surely, 2^{78535478768761} is an apocalyptic number.

It is an amenable number.

78535478768761 is a deficient number, since it is larger than the sum of its proper divisors (11411548616519).

78535478768761 is a wasteful number, since it uses less digits than its factorization.

78535478768761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24024313343.

The product of its digits is 13276569600, while the sum is 82.

The spelling of 78535478768761 in words is "seventy-eight trillion, five hundred thirty-five billion, four hundred seventy-eight million, seven hundred sixty-eight thousand, seven hundred sixty-one".