40535663238 has 24 divisors (see below), whose sum is σ = 100374023568. Its totient is φ = 11581618032.

The previous prime is 40535663213. The next prime is 40535663257. The reversal of 40535663238 is 83236653504.

40535663238 is a `hidden beast` number, since 4 + 0 + 5 + 3 + 5 + 6 + 632 + 3 + 8 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40535663193 and 40535663202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160855681 + ... + 160855932.

It is an arithmetic number, because the mean of its divisors is an integer number (4182250982).

Almost surely, 2^40535663238 is an apocalyptic number.

40535663238 is an abundant number, since it is smaller than the sum of its proper divisors (59838360330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40535663238 is a wasteful number, since it uses less digits than its factorization.

40535663238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321711628 (or 321711625 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 45.

The spelling of 40535663238 in words is "forty billion, five hundred thirty-five million, six hundred sixty-three thousand, two hundred thirty-eight".