40400355512 has 64 divisors (see below), whose sum is σ = 83495111040. Its totient is φ = 18173488000.

The previous prime is 40400355509. The next prime is 40400355563. The reversal of 40400355512 is 21555300404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13661138 + ... + 13664094.

It is an arithmetic number, because the mean of its divisors is an integer number (1304611110).

Almost surely, 2^40400355512 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 40400355512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41747555520).

40400355512 is an abundant number, since it is smaller than the sum of its proper divisors (43094755528).

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

40400355512 is a wasteful number, since it uses less digits than its factorization.

40400355512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4532 (or 4528 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 40400355512 its reverse (21555300404), we get a palindrome (61955655916).

The spelling of 40400355512 in words is "forty billion, four hundred million, three hundred fifty-five thousand, five hundred twelve".