79351569990 has 192 divisors, whose sum is σ = 257471764992. Its totient is φ = 16472678400.

The previous prime is 79351569907. The next prime is 79351570013. The reversal of 79351569990 is 9996515397.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7985325 + ... + 7995255.

It is an arithmetic number, because the mean of its divisors is an integer number (1340998776).

Almost surely, 2^79351569990 is an apocalyptic number.

79351569990 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 79351569990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128735882496).

79351569990 is an abundant number, since it is smaller than the sum of its proper divisors (178120195002).

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

79351569990 is a wasteful number, since it uses less digits than its factorization.

79351569990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11115 (or 11112 counting only the distinct ones).

The product of its (nonzero) digits is 20667150, while the sum is 63.

The spelling of 79351569990 in words is "seventy-nine billion, three hundred fifty-one million, five hundred sixty-nine thousand, nine hundred ninety".