40000501521 has 12 divisors (see below), whose sum is σ = 57834125440. Its totient is φ = 26641328760.

The previous prime is 40000501511. The next prime is 40000501553. The reversal of 40000501521 is 12510500004.

It is not a de Polignac number, because 40000501521 - 2³⁴ = 22820632337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40000501494 and 40000501503.

It is not an unprimeable number, because it can be changed into a prime (40000501511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2129485 + ... + 2148186.

Almost surely, 2^40000501521 is an apocalyptic number.

It is an amenable number.

40000501521 is a deficient number, since it is larger than the sum of its proper divisors (17833623919).

40000501521 is a wasteful number, since it uses less digits than its factorization.

40000501521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4278716 (or 4278713 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The spelling of 40000501521 in words is "forty billion, five hundred one thousand, five hundred twenty-one".