78454520426005 has 8 divisors (see below), whose sum is σ = 99683390659032. Its totient is φ = 59071638908928.

The previous prime is 78454520426003. The next prime is 78454520426033. The reversal of 78454520426005 is 50062402545487.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29535029328996 + 48919491097009 = 5434614^2 + 6994247^2 .

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 78454520426005 - 2¹ = 78454520426003 is a prime.

It is a super-2 number, since 2×78454520426005² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78454520426003) 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, 461497178892 + ... + 461497179061.

It is an arithmetic number, because the mean of its divisors is an integer number (12460423832379).

Almost surely, 2^{78454520426005} is an apocalyptic number.

It is an amenable number.

78454520426005 is a deficient number, since it is larger than the sum of its proper divisors (21228870233027).

78454520426005 is a wasteful number, since it uses less digits than its factorization.

78454520426005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922994357975.

The product of its (nonzero) digits is 10752000, while the sum is 52.

The spelling of 78454520426005 in words is "seventy-eight trillion, four hundred fifty-four billion, five hundred twenty million, four hundred twenty-six thousand, five".