78211741488 has 80 divisors (see below), whose sum is σ = 205499513856. Its totient is φ = 25628797440.

The previous prime is 78211741459. The next prime is 78211741519. The reversal of 78211741488 is 88414711287.

It is a happy number.

It is a super-2 number, since 2×78211741488² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78211741488.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 619593 + ... + 735063.

Almost surely, 2^78211741488 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 78211741488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102749756928).

78211741488 is an abundant number, since it is smaller than the sum of its proper divisors (127287772368).

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

78211741488 is a wasteful number, since it uses less digits than its factorization.

78211741488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115722 (or 115716 counting only the distinct ones).

The product of its digits is 802816, while the sum is 51.

The spelling of 78211741488 in words is "seventy-eight billion, two hundred eleven million, seven hundred forty-one thousand, four hundred eighty-eight".