40154434655 has 32 divisors (see below), whose sum is σ = 51573836160. Its totient is φ = 29938360320.

The previous prime is 40154434651. The next prime is 40154434669. The reversal of 40154434655 is 55643445104.

It is not a de Polignac number, because 40154434655 - 2² = 40154434651 is a prime.

It is a super-2 number, since 2×40154434655² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40154434651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3903599 + ... + 3913871.

It is an arithmetic number, because the mean of its divisors is an integer number (1611682380).

Almost surely, 2^40154434655 is an apocalyptic number.

40154434655 is a deficient number, since it is larger than the sum of its proper divisors (11419401505).

40154434655 is a wasteful number, since it uses less digits than its factorization.

40154434655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11171.

The product of its (nonzero) digits is 576000, while the sum is 41.

Adding to 40154434655 its reverse (55643445104), we get a palindrome (95797879759).

The spelling of 40154434655 in words is "forty billion, one hundred fifty-four million, four hundred thirty-four thousand, six hundred fifty-five".