805155340038 has 64 divisors (see below), whose sum is σ = 1866066557952. Its totient is φ = 226832140800.

The previous prime is 805155340021. The next prime is 805155340063. The reversal of 805155340038 is 830043551508.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12055938 + ... + 12122538.

It is an arithmetic number, because the mean of its divisors is an integer number (29157289968).

Almost surely, 2^805155340038 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 805155340038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (933033278976).

805155340038 is an abundant number, since it is smaller than the sum of its proper divisors (1060911217914).

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

805155340038 is a wasteful number, since it uses less digits than its factorization.

805155340038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70629.

The product of its (nonzero) digits is 288000, while the sum is 42.

The spelling of 805155340038 in words is "eight hundred five billion, one hundred fifty-five million, three hundred forty thousand, thirty-eight".