83146780398 has 128 divisors (see below), whose sum is σ = 187770617856. Its totient is φ = 24329289600.

The previous prime is 83146780331. The next prime is 83146780399. The reversal of 83146780398 is 89308764138.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83146780399) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 131769543 + ... + 131770173.

It is an arithmetic number, because the mean of its divisors is an integer number (1466957952).

Almost surely, 2^83146780398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83146780398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93885308928).

83146780398 is an abundant number, since it is smaller than the sum of its proper divisors (104623837458).

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

83146780398 is a wasteful number, since it uses less digits than its factorization.

83146780398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198.

The product of its (nonzero) digits is 6967296, while the sum is 57.

The spelling of 83146780398 in words is "eighty-three billion, one hundred forty-six million, seven hundred eighty thousand, three hundred ninety-eight".