40400293509 has 8 divisors (see below), whose sum is σ = 59852286720. Its totient is φ = 26933528988.

The previous prime is 40400293489. The next prime is 40400293513. The reversal of 40400293509 is 90539200404.

It is not a de Polignac number, because 40400293509 - 2⁸ = 40400293253 is a prime.

It is a super-2 number, since 2×40400293509² (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 (40400293519) 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, 748153557 + ... + 748153610.

It is an arithmetic number, because the mean of its divisors is an integer number (7481535840).

Almost surely, 2^40400293509 is an apocalyptic number.

It is an amenable number.

40400293509 is a deficient number, since it is larger than the sum of its proper divisors (19451993211).

40400293509 is a wasteful number, since it uses less digits than its factorization.

40400293509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496307176 (or 1496307170 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 40400293509 in words is "forty billion, four hundred million, two hundred ninety-three thousand, five hundred nine".