78379012249 has 8 divisors (see below), whose sum is σ = 82508112000. Its totient is φ = 74250301392.

The previous prime is 78379012247. The next prime is 78379012337. The reversal of 78379012249 is 94221097387.

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 78379012249 - 2¹ = 78379012247 is a prime.

It is a super-2 number, since 2×78379012249² (a number of 23 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 = 78379012196 and 78379012205.

It is not an unprimeable number, because it can be changed into a prime (78379012247) 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 7 ways as a sum of consecutive naturals, for example, 375447 + ... + 545635.

It is an arithmetic number, because the mean of its divisors is an integer number (10313514000).

Almost surely, 2^78379012249 is an apocalyptic number.

It is an amenable number.

78379012249 is a deficient number, since it is larger than the sum of its proper divisors (4129099751).

78379012249 is a wasteful number, since it uses less digits than its factorization.

78379012249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194447.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The spelling of 78379012249 in words is "seventy-eight billion, three hundred seventy-nine million, twelve thousand, two hundred forty-nine".