79251440550 has 96 divisors (see below), whose sum is σ = 207445413120. Its totient is φ = 19967472000.

The previous prime is 79251440549. The next prime is 79251440579. The reversal of 79251440550 is 5504415297.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1025775 + ... + 1100325.

It is an arithmetic number, because the mean of its divisors is an integer number (2160889720).

Almost surely, 2^79251440550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79251440550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103722706560).

79251440550 is an abundant number, since it is smaller than the sum of its proper divisors (128193972570).

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

79251440550 is a wasteful number, since it uses less digits than its factorization.

79251440550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74958 (or 74953 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 42.

The spelling of 79251440550 in words is "seventy-nine billion, two hundred fifty-one million, four hundred forty thousand, five hundred fifty".