40505898912 has 96 divisors (see below), whose sum is σ = 113234127552. Its totient is φ = 12634189824.

The previous prime is 40505898893. The next prime is 40505898913. The reversal of 40505898912 is 21989850504.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (40505898913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210603 + ... + 354069.

It is an arithmetic number, because the mean of its divisors is an integer number (1179522162).

Almost surely, 2^40505898912 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 40505898912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56617063776).

40505898912 is an abundant number, since it is smaller than the sum of its proper divisors (72728228640).

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

40505898912 is a wasteful number, since it uses less digits than its factorization.

40505898912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143670 (or 143662 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 51.

The spelling of 40505898912 in words is "forty billion, five hundred five million, eight hundred ninety-eight thousand, nine hundred twelve".