40312205664 has 48 divisors (see below), whose sum is σ = 108679537008. Its totient is φ = 13074227712.

The previous prime is 40312205623. The next prime is 40312205753. The reversal of 40312205664 is 46650221304.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5671027 + ... + 5678130.

It is an arithmetic number, because the mean of its divisors is an integer number (2264157021).

Almost surely, 2^40312205664 is an apocalyptic number.

It is an amenable number.

40312205664 is an abundant number, since it is smaller than the sum of its proper divisors (68367331344).

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

40312205664 is a wasteful number, since it uses less digits than its factorization.

40312205664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11349207 (or 11349199 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 40312205664 its reverse (46650221304), we get a palindrome (86962426968).

The spelling of 40312205664 in words is "forty billion, three hundred twelve million, two hundred five thousand, six hundred sixty-four".