78203518426157 has 4 divisors (see below), whose sum is σ = 78209769219456. Its totient is φ = 78197267632860.

The previous prime is 78203518426141. The next prime is 78203518426177. The reversal of 78203518426157 is 75162481530287.

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 78203518426157 - 2⁴ = 78203518426141 is a prime.

It is a super-2 number, since 2×78203518426157² (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 = 78203518426096 and 78203518426105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78203518426177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3125377883 + ... + 3125402904.

It is an arithmetic number, because the mean of its divisors is an integer number (19552442304864).

Almost surely, 2^{78203518426157} is an apocalyptic number.

It is an amenable number.

78203518426157 is a deficient number, since it is larger than the sum of its proper divisors (6250793299).

78203518426157 is a wasteful number, since it uses less digits than its factorization.

78203518426157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6250793298.

The product of its (nonzero) digits is 22579200, while the sum is 59.

The spelling of 78203518426157 in words is "seventy-eight trillion, two hundred three billion, five hundred eighteen million, four hundred twenty-six thousand, one hundred fifty-seven".