79179387840 has 448 divisors, whose sum is σ = 333116651520. Its totient is φ = 17310965760.

The previous prime is 79179387839. The next prime is 79179387841. The reversal of 79179387840 is 4878397197.

79179387840 is a `hidden beast` number, since 7 + 9 + 179 + 387 + 84 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (79179387839) and next prime (79179387841).

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79179387841) 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 63 ways as a sum of consecutive naturals, for example, 1362580 + ... + 1419500.

Almost surely, 2^79179387840 is an apocalyptic number.

79179387840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79179387840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166558325760).

79179387840 is an abundant number, since it is smaller than the sum of its proper divisors (253937263680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79179387840 is a wasteful number, since it uses less digits than its factorization.

79179387840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56977 (or 56961 counting only the distinct ones).

The product of its (nonzero) digits is 21337344, while the sum is 63.

The spelling of 79179387840 in words is "seventy-nine billion, one hundred seventy-nine million, three hundred eighty-seven thousand, eight hundred forty".