83405426280 has 256 divisors, whose sum is σ = 275904921600. Its totient is φ = 20002590720.

The previous prime is 83405426267. The next prime is 83405426297. The reversal of 83405426280 is 8262450438.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 99410101 + ... + 99410939.

It is an arithmetic number, because the mean of its divisors is an integer number (1077753600).

Almost surely, 2^83405426280 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 83405426280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137952460800).

83405426280 is an abundant number, since it is smaller than the sum of its proper divisors (192499495320).

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

83405426280 is a wasteful number, since it uses less digits than its factorization.

83405426280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584 (or 1580 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 42.

The spelling of 83405426280 in words is "eighty-three billion, four hundred five million, four hundred twenty-six thousand, two hundred eighty".