83855305251172 has 240 divisors, whose sum is σ = 194359973455872. Its totient is φ = 31420294053120.

The previous prime is 83855305251169. The next prime is 83855305251173. The reversal of 83855305251172 is 27115250355838.

It is not an unprimeable number, because it can be changed into a prime (83855305251173) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 181678878 + ... + 182139850.

Almost surely, 2^{83855305251172} 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 83855305251172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97179986727936).

83855305251172 is an abundant number, since it is smaller than the sum of its proper divisors (110504668204700).

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

83855305251172 is a wasteful number, since it uses less digits than its factorization.

83855305251172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461096 (or 461073 counting only the distinct ones).

The product of its (nonzero) digits is 10080000, while the sum is 55.

The spelling of 83855305251172 in words is "eighty-three trillion, eight hundred fifty-five billion, three hundred five million, two hundred fifty-one thousand, one hundred seventy-two".