40154056042 has 4 divisors (see below), whose sum is σ = 60231084066. Its totient is φ = 20077028020.

The previous prime is 40154056031. The next prime is 40154056043. The reversal of 40154056042 is 24065045104.

It is a happy number.

40154056042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 35657146561 + 4496909481 = 188831^2 + 67059^2 .

It is a super-2 number, since 2×40154056042² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 40154055995 and 40154056013.

It is not an unprimeable number, because it can be changed into a prime (40154056043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10038514009 + ... + 10038514012.

Almost surely, 2^40154056042 is an apocalyptic number.

40154056042 is a deficient number, since it is larger than the sum of its proper divisors (20077028024).

40154056042 is a wasteful number, since it uses less digits than its factorization.

40154056042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20077028023.

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 40154056042 in words is "forty billion, one hundred fifty-four million, fifty-six thousand, forty-two".