40379771008 has 64 divisors (see below), whose sum is σ = 82384012800. Its totient is φ = 19705393152.

The previous prime is 40379770969. The next prime is 40379771009. The reversal of 40379771008 is 80017797304.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (40379771009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2198728 + ... + 2217016.

It is an arithmetic number, because the mean of its divisors is an integer number (1287250200).

Almost surely, 2^40379771008 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 40379771008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41192006400).

40379771008 is an abundant number, since it is smaller than the sum of its proper divisors (42004241792).

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

40379771008 is a wasteful number, since it uses less digits than its factorization.

40379771008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18717 (or 18705 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 46.

The spelling of 40379771008 in words is "forty billion, three hundred seventy-nine million, seven hundred seventy-one thousand, eight".