78298254791 has 8 divisors (see below), whose sum is σ = 80219621664. Its totient is φ = 76399626240.

The previous prime is 78298254787. The next prime is 78298254829. The reversal of 78298254791 is 19745289287.

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 78298254791 - 2² = 78298254787 is a prime.

It is a super-2 number, since 2×78298254791² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78298254701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5677610 + ... + 5691383.

It is an arithmetic number, because the mean of its divisors is an integer number (10027452708).

Almost surely, 2^78298254791 is an apocalyptic number.

78298254791 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

78298254791 is a deficient number, since it is larger than the sum of its proper divisors (1921366873).

78298254791 is a wasteful number, since it uses less digits than its factorization.

78298254791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11369161.

The product of its digits is 20321280, while the sum is 62.

The spelling of 78298254791 in words is "seventy-eight billion, two hundred ninety-eight million, two hundred fifty-four thousand, seven hundred ninety-one".