40155642505 has 16 divisors (see below), whose sum is σ = 52889897664. Its totient is φ = 29024930880.

The previous prime is 40155642479. The next prime is 40155642509. The reversal of 40155642505 is 50524655104.

It is not a de Polignac number, because 40155642505 - 2¹¹ = 40155640457 is a prime.

It is a super-2 number, since 2×40155642505² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40155642509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2230614 + ... + 2248543.

It is an arithmetic number, because the mean of its divisors is an integer number (3305618604).

Almost surely, 2^40155642505 is an apocalyptic number.

It is an amenable number.

40155642505 is a deficient number, since it is larger than the sum of its proper divisors (12734255159).

40155642505 is a wasteful number, since it uses less digits than its factorization.

40155642505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4479336.

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 40155642505 in words is "forty billion, one hundred fifty-five million, six hundred forty-two thousand, five hundred five".