40640023504 has 10 divisors (see below), whose sum is σ = 78740045570. Its totient is φ = 20320011744.

The previous prime is 40640023477. The next prime is 40640023507. The reversal of 40640023504 is 40532004604.

40640023504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 20549795904 + 20090227600 = 143352^2 + 141740^2 .

It is a super-2 number, since 2×40640023504² (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 (40640023507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270000719 + ... + 1270000750.

It is an arithmetic number, because the mean of its divisors is an integer number (7874004557).

Almost surely, 2^40640023504 is an apocalyptic number.

It is an amenable number.

40640023504 is a deficient number, since it is larger than the sum of its proper divisors (38100022066).

40640023504 is a wasteful number, since it uses less digits than its factorization.

40640023504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540001477 (or 2540001471 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The spelling of 40640023504 in words is "forty billion, six hundred forty million, twenty-three thousand, five hundred four".