40140564664 has 8 divisors (see below), whose sum is σ = 75263558760. Its totient is φ = 20070282328.

The previous prime is 40140564661. The next prime is 40140564671. The reversal of 40140564664 is 46646504104.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×40140564664² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40140564661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2508785284 + ... + 2508785299.

It is an arithmetic number, because the mean of its divisors is an integer number (9407944845).

Almost surely, 2^40140564664 is an apocalyptic number.

It is an amenable number.

40140564664 is a deficient number, since it is larger than the sum of its proper divisors (35122994096).

40140564664 is a wasteful number, since it uses less digits than its factorization.

40140564664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5017570589 (or 5017570585 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 40140564664 in words is "forty billion, one hundred forty million, five hundred sixty-four thousand, six hundred sixty-four".