40345347820 has 12 divisors (see below), whose sum is σ = 84725230464. Its totient is φ = 16138139120.

The previous prime is 40345347737. The next prime is 40345347853. The reversal of 40345347820 is 2874354304.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1008633676 + ... + 1008633715.

It is an arithmetic number, because the mean of its divisors is an integer number (7060435872).

Almost surely, 2^40345347820 is an apocalyptic number.

It is an amenable number.

40345347820 is an abundant number, since it is smaller than the sum of its proper divisors (44379882644).

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

40345347820 is a wasteful number, since it uses less digits than its factorization.

40345347820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2017267400 (or 2017267398 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 40.

The spelling of 40345347820 in words is "forty billion, three hundred forty-five million, three hundred forty-seven thousand, eight hundred twenty".