79382421090 has 448 divisors, whose sum is σ = 254975040000. Its totient is φ = 17772483456.

The previous prime is 79382420981. The next prime is 79382421103. The reversal of 79382421090 is 9012428397.

It is a super-2 number, since 2×79382421090² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 132524611 + ... + 132525209.

Almost surely, 2^79382421090 is an apocalyptic number.

79382421090 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 79382421090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127487520000).

79382421090 is an abundant number, since it is smaller than the sum of its proper divisors (175592618910).

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

79382421090 is an equidigital number, since it uses as much as digits as its factorization.

79382421090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 79382421090 in words is "seventy-nine billion, three hundred eighty-two million, four hundred twenty-one thousand, ninety".