40011543253521 has 48 divisors (see below), whose sum is σ = 66860226800640. Its totient is φ = 22583665703520.

The previous prime is 40011543253483. The next prime is 40011543253567. The reversal of 40011543253521 is 12535234511004.

40011543253521 is a `hidden beast` number, since 4 + 0 + 0 + 1 + 1 + 54 + 32 + 53 + 521 = 666.

It is not a de Polignac number, because 40011543253521 - 2⁶ = 40011543253457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40011543253021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24943666 + ... + 26499236.

It is an arithmetic number, because the mean of its divisors is an integer number (1392921391680).

Almost surely, 2^{40011543253521} is an apocalyptic number.

It is an amenable number.

40011543253521 is a deficient number, since it is larger than the sum of its proper divisors (26848683547119).

40011543253521 is a wasteful number, since it uses less digits than its factorization.

40011543253521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560586 (or 1560583 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 40011543253521 its reverse (12535234511004), we get a palindrome (52546777764525).

The spelling of 40011543253521 in words is "forty trillion, eleven billion, five hundred forty-three million, two hundred fifty-three thousand, five hundred twenty-one".