40398521247 has 24 divisors (see below), whose sum is σ = 67628920320. Its totient is φ = 22759727760.

The previous prime is 40398521239. The next prime is 40398521257. The reversal of 40398521247 is 74212589304.

40398521247 is a `hidden beast` number, since 4 + 0 + 398 + 5 + 212 + 47 = 666.

It is not a de Polignac number, because 40398521247 - 2³ = 40398521239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40398521227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4511347 + ... + 4520292.

It is an arithmetic number, because the mean of its divisors is an integer number (2817871680).

Almost surely, 2^40398521247 is an apocalyptic number.

40398521247 is a deficient number, since it is larger than the sum of its proper divisors (27230399073).

40398521247 is a wasteful number, since it uses less digits than its factorization.

40398521247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9031723 (or 9031720 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 40398521247 in words is "forty billion, three hundred ninety-eight million, five hundred twenty-one thousand, two hundred forty-seven".