100282421778 has 64 divisors (see below), whose sum is σ = 250290017280. Its totient is φ = 26022888000.

The previous prime is 100282421773. The next prime is 100282421791. The reversal of 100282421778 is 877124282001.

100282421778 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (100282421773) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 392353 + ... + 595403.

It is an arithmetic number, because the mean of its divisors is an integer number (3910781520).

Almost surely, 2^100282421778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100282421778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125145008640).

100282421778 is an abundant number, since it is smaller than the sum of its proper divisors (150007595502).

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

100282421778 is a wasteful number, since it uses less digits than its factorization.

100282421778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204143.

The product of its (nonzero) digits is 100352, while the sum is 42.

The spelling of 100282421778 in words is "one hundred billion, two hundred eighty-two million, four hundred twenty-one thousand, seven hundred seventy-eight".