40123204512015 has 64 divisors (see below), whose sum is σ = 64450623283200. Its totient is φ = 21314773060224.

The previous prime is 40123204511963. The next prime is 40123204512059. The reversal of 40123204512015 is 51021540232104.

It is not a de Polignac number, because 40123204512015 - 2¹¹ = 40123204509967 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8019826504 + ... + 8019831506.

It is an arithmetic number, because the mean of its divisors is an integer number (1007040988800).

Almost surely, 2^{40123204512015} is an apocalyptic number.

40123204512015 is a deficient number, since it is larger than the sum of its proper divisors (24327418771185).

40123204512015 is a wasteful number, since it uses less digits than its factorization.

40123204512015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7476.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 40123204512015 its reverse (51021540232104), we get a palindrome (91144744744119).

The spelling of 40123204512015 in words is "forty trillion, one hundred twenty-three billion, two hundred four million, five hundred twelve thousand, fifteen".