40015640145 has 32 divisors (see below), whose sum is σ = 73005916032. Its totient is φ = 18541181952.

The previous prime is 40015640141. The next prime is 40015640207. The reversal of 40015640145 is 54104651004.

It is not a de Polignac number, because 40015640145 - 2² = 40015640141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40015640141) 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, 6032227 + ... + 6038856.

It is an arithmetic number, because the mean of its divisors is an integer number (2281434876).

Almost surely, 2^40015640145 is an apocalyptic number.

It is an amenable number.

40015640145 is a deficient number, since it is larger than the sum of its proper divisors (32990275887).

40015640145 is a wasteful number, since it uses less digits than its factorization.

40015640145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12071121.

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

The spelling of 40015640145 in words is "forty billion, fifteen million, six hundred forty thousand, one hundred forty-five".