40398408513 has 24 divisors (see below), whose sum is σ = 61433498880. Its totient is φ = 25511038560.

The previous prime is 40398408497. The next prime is 40398408521. The reversal of 40398408513 is 31580489304.

40398408513 is a `hidden beast` number, since 4 + 0 + 3 + 98 + 40 + 8 + 513 = 666.

It is not a de Polignac number, because 40398408513 - 2⁴ = 40398408497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40398408563) 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, 1579495 + ... + 1604867.

It is an arithmetic number, because the mean of its divisors is an integer number (2559729120).

Almost surely, 2^40398408513 is an apocalyptic number.

It is an amenable number.

40398408513 is a deficient number, since it is larger than the sum of its proper divisors (21035090367).

40398408513 is a wasteful number, since it uses less digits than its factorization.

40398408513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34709 (or 34706 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 40398408513 in words is "forty billion, three hundred ninety-eight million, four hundred eight thousand, five hundred thirteen".