79123377690 has 192 divisors, whose sum is σ = 245665768320. Its totient is φ = 18069004800.

The previous prime is 79123377677. The next prime is 79123377691. The reversal of 79123377690 is 9677332197.

It is a happy number.

It is a super-2 number, since 2×79123377690² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (79123377691) 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 95 ways as a sum of consecutive naturals, for example, 20544265 + ... + 20548115.

It is an arithmetic number, because the mean of its divisors is an integer number (1279509210).

Almost surely, 2^79123377690 is an apocalyptic number.

79123377690 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 79123377690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122832884160).

79123377690 is an abundant number, since it is smaller than the sum of its proper divisors (166542390630).

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

79123377690 is a wasteful number, since it uses less digits than its factorization.

79123377690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5434 (or 5421 counting only the distinct ones).

The product of its (nonzero) digits is 3000564, while the sum is 54.

The spelling of 79123377690 in words is "seventy-nine billion, one hundred twenty-three million, three hundred seventy-seven thousand, six hundred ninety".