40040256556 has 24 divisors (see below), whose sum is σ = 73815680960. Its totient is φ = 18951699600.

The previous prime is 40040256479. The next prime is 40040256559. The reversal of 40040256556 is 65565204004.

It is a super-2 number, since 2×40040256556² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40040256559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105930 + ... + 302161.

Almost surely, 2^40040256556 is an apocalyptic number.

It is an amenable number.

40040256556 is a deficient number, since it is larger than the sum of its proper divisors (33775424404).

40040256556 is a wasteful number, since it uses less digits than its factorization.

40040256556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409405 (or 409403 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 40040256556 in words is "forty billion, forty million, two hundred fifty-six thousand, five hundred fifty-six".