78380271516 has 96 divisors (see below), whose sum is σ = 195627091968. Its totient is φ = 24365880000.

The previous prime is 78380271511. The next prime is 78380271517. The reversal of 78380271516 is 61517208387.

It is a happy number.

It is a super-2 number, since 2×78380271516² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78380271511) 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 31 ways as a sum of consecutive naturals, for example, 6960891 + ... + 6972141.

It is an arithmetic number, because the mean of its divisors is an integer number (2037782208).

Almost surely, 2^78380271516 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 78380271516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97813545984).

78380271516 is an abundant number, since it is smaller than the sum of its proper divisors (117246820452).

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

78380271516 is a wasteful number, since it uses less digits than its factorization.

78380271516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11911 (or 11909 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 78380271516 in words is "seventy-eight billion, three hundred eighty million, two hundred seventy-one thousand, five hundred sixteen".