78271270890 has 64 divisors (see below), whose sum is σ = 191099865600. Its totient is φ = 20511600704.

The previous prime is 78271270877. The next prime is 78271270921. The reversal of 78271270890 is 9807217287.

It is a happy number.

It is a super-2 number, since 2×78271270890² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7108129 + ... + 7119131.

It is an arithmetic number, because the mean of its divisors is an integer number (2985935400).

Almost surely, 2^78271270890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78271270890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95549932800).

78271270890 is an abundant number, since it is smaller than the sum of its proper divisors (112828594710).

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

78271270890 is a wasteful number, since it uses less digits than its factorization.

78271270890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15091.

The product of its (nonzero) digits is 790272, while the sum is 51.

The spelling of 78271270890 in words is "seventy-eight billion, two hundred seventy-one million, two hundred seventy thousand, eight hundred ninety".