40161108688545 has 128 divisors (see below), whose sum is σ = 73523552256000. Its totient is φ = 18556624032768.

The previous prime is 40161108688541. The next prime is 40161108688573. The reversal of 40161108688545 is 54588680116104.

It is not a de Polignac number, because 40161108688545 - 2² = 40161108688541 is a prime.

It is a super-2 number, since 2×40161108688545² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (40161108688541) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 211338262 + ... + 211528208.

It is an arithmetic number, because the mean of its divisors is an integer number (574402752000).

Almost surely, 2^{40161108688545} is an apocalyptic number.

It is an amenable number.

40161108688545 is a deficient number, since it is larger than the sum of its proper divisors (33362443567455).

40161108688545 is a wasteful number, since it uses less digits than its factorization.

40161108688545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190519.

The product of its (nonzero) digits is 7372800, while the sum is 57.

The spelling of 40161108688545 in words is "forty trillion, one hundred sixty-one billion, one hundred eight million, six hundred eighty-eight thousand, five hundred forty-five".