79155442400 has 144 divisors (see below), whose sum is σ = 195827466240. Its totient is φ = 31240742400.

The previous prime is 79155442369. The next prime is 79155442411. The reversal of 79155442400 is 424455197.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19403561 + ... + 19407639.

It is an arithmetic number, because the mean of its divisors is an integer number (1359912960).

Almost surely, 2^79155442400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79155442400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97913733120).

79155442400 is an abundant number, since it is smaller than the sum of its proper divisors (116672023840).

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

79155442400 is a wasteful number, since it uses less digits than its factorization.

79155442400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4417 (or 4404 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 41.

Adding to 79155442400 its reverse (424455197), we get a palindrome (79579897597).

The spelling of 79155442400 in words is "seventy-nine billion, one hundred fifty-five million, four hundred forty-two thousand, four hundred".