1918914650015 has 32 divisors (see below), whose sum is σ = 2546730720000. Its totient is φ = 1376302475520.

The previous prime is 1918914649991. The next prime is 1918914650017. The reversal of 1918914650015 is 5100564198191.

It is not a de Polignac number, because 1918914650015 - 2¹⁰ = 1918914648991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918914650017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45344336 + ... + 45386634.

It is an arithmetic number, because the mean of its divisors is an integer number (79585335000).

Almost surely, 2^{1918914650015} is an apocalyptic number.

1918914650015 is a deficient number, since it is larger than the sum of its proper divisors (627816069985).

1918914650015 is a wasteful number, since it uses less digits than its factorization.

1918914650015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53687.

The product of its (nonzero) digits is 388800, while the sum is 50.

The spelling of 1918914650015 in words is "one trillion, nine hundred eighteen billion, nine hundred fourteen million, six hundred fifty thousand, fifteen".