42540120653205 has 64 divisors (see below), whose sum is σ = 81264361586688. Its totient is φ = 18592850350080.

The previous prime is 42540120653197. The next prime is 42540120653279. The reversal of 42540120653205 is 50235602104524.

It is not a de Polignac number, because 42540120653205 - 2³ = 42540120653197 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 78459724 + ... + 79000053.

It is an arithmetic number, because the mean of its divisors is an integer number (1269755649792).

Almost surely, 2^{42540120653205} is an apocalyptic number.

It is an amenable number.

42540120653205 is a deficient number, since it is larger than the sum of its proper divisors (38724240933483).

42540120653205 is a wasteful number, since it uses less digits than its factorization.

42540120653205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157459906.

The product of its (nonzero) digits is 288000, while the sum is 39.

Adding to 42540120653205 its reverse (50235602104524), we get a palindrome (92775722757729).

The spelling of 42540120653205 in words is "forty-two trillion, five hundred forty billion, one hundred twenty million, six hundred fifty-three thousand, two hundred five".