78205825207361 has 4 divisors (see below), whose sum is σ = 78205926052800. Its totient is φ = 78205724361924.

The previous prime is 78205825207339. The next prime is 78205825207421. The reversal of 78205825207361 is 16370252850287.

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 78205825207361 - 2⁴⁶ = 7837081029697 is a prime.

It is a super-2 number, since 2×78205825207361² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78205825207297 and 78205825207306.

It is not an unprimeable number, because it can be changed into a prime (78205825297361) 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, 49250381 + ... + 50813498.

It is an arithmetic number, because the mean of its divisors is an integer number (19551481513200).

Almost surely, 2^{78205825207361} is an apocalyptic number.

It is an amenable number.

78205825207361 is a deficient number, since it is larger than the sum of its proper divisors (100845439).

78205825207361 is a wasteful number, since it uses less digits than its factorization.

78205825207361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100845438.

The product of its (nonzero) digits is 11289600, while the sum is 56.

The spelling of 78205825207361 in words is "seventy-eight trillion, two hundred five billion, eight hundred twenty-five million, two hundred seven thousand, three hundred sixty-one".