78598356481 has 4 divisors (see below), whose sum is σ = 82015676352. Its totient is φ = 75181036612.

The previous prime is 78598356433. The next prime is 78598356491. The reversal of 78598356481 is 18465389587.

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 78598356481 - 2¹¹ = 78598354433 is a prime.

It is a super-2 number, since 2×78598356481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78598356401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1708659901 + ... + 1708659946.

It is an arithmetic number, because the mean of its divisors is an integer number (20503919088).

Almost surely, 2^78598356481 is an apocalyptic number.

It is an amenable number.

78598356481 is a deficient number, since it is larger than the sum of its proper divisors (3417319871).

78598356481 is a wasteful number, since it uses less digits than its factorization.

78598356481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3417319870.

The product of its digits is 58060800, while the sum is 64.

The spelling of 78598356481 in words is "seventy-eight billion, five hundred ninety-eight million, three hundred fifty-six thousand, four hundred eighty-one".