40540212523 has 4 divisors (see below), whose sum is σ = 40576769280. Its totient is φ = 40503655768.

The previous prime is 40540212481. The next prime is 40540212553. The reversal of 40540212523 is 32521204504.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40540212523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40540212491 and 40540212500.

It is not an unprimeable number, because it can be changed into a prime (40540212553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18276715 + ... + 18278932.

It is an arithmetic number, because the mean of its divisors is an integer number (10144192320).

Almost surely, 2^40540212523 is an apocalyptic number.

40540212523 is a deficient number, since it is larger than the sum of its proper divisors (36556757).

40540212523 is a wasteful number, since it uses less digits than its factorization.

40540212523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36556756.

The product of its (nonzero) digits is 9600, while the sum is 28.

The spelling of 40540212523 in words is "forty billion, five hundred forty million, two hundred twelve thousand, five hundred twenty-three".