78334215354401 has 4 divisors (see below), whose sum is σ = 78334250151600. Its totient is φ = 78334180557204.

The previous prime is 78334215354397. The next prime is 78334215354407. The reversal of 78334215354401 is 10445351243387.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78334215354401 - 2² = 78334215354397 is a prime.

It is a super-2 number, since 2×78334215354401² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78334215354401.

It is not an unprimeable number, because it can be changed into a prime (78334215354407) 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, 13769531 + ... + 18608288.

It is an arithmetic number, because the mean of its divisors is an integer number (19583562537900).

Almost surely, 2^{78334215354401} is an apocalyptic number.

It is an amenable number.

78334215354401 is a deficient number, since it is larger than the sum of its proper divisors (34797199).

78334215354401 is a wasteful number, since it uses less digits than its factorization.

78334215354401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34797198.

The product of its (nonzero) digits is 4838400, while the sum is 50.

Adding to 78334215354401 its reverse (10445351243387), we get a palindrome (88779566597788).

The spelling of 78334215354401 in words is "seventy-eight trillion, three hundred thirty-four billion, two hundred fifteen million, three hundred fifty-four thousand, four hundred one".