40254351551205 has 64 divisors (see below), whose sum is σ = 71058345845760. Its totient is φ = 19296134950400.

The previous prime is 40254351551143. The next prime is 40254351551209. The reversal of 40254351551205 is 50215515345204.

It is a happy number.

It is not a de Polignac number, because 40254351551205 - 2¹³ = 40254351543013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40254351551209) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 161454490 + ... + 161703620.

It is an arithmetic number, because the mean of its divisors is an integer number (1110286653840).

Almost surely, 2^{40254351551205} is an apocalyptic number.

It is an amenable number.

40254351551205 is a deficient number, since it is larger than the sum of its proper divisors (30803994294555).

40254351551205 is a wasteful number, since it uses less digits than its factorization.

40254351551205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260242.

The product of its (nonzero) digits is 600000, while the sum is 42.

Adding to 40254351551205 its reverse (50215515345204), we get a palindrome (90469866896409).

The spelling of 40254351551205 in words is "forty trillion, two hundred fifty-four billion, three hundred fifty-one million, five hundred fifty-one thousand, two hundred five".