40208680399 has 4 divisors (see below), whose sum is σ = 40211590536. Its totient is φ = 40205770264.

The previous prime is 40208680397. The next prime is 40208680427. The reversal of 40208680399 is 99308680204.

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

It is a cyclic number.

It is not a de Polignac number, because 40208680399 - 2¹ = 40208680397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40208680397) 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, 1434244 + ... + 1462009.

It is an arithmetic number, because the mean of its divisors is an integer number (10052897634).

Almost surely, 2^40208680399 is an apocalyptic number.

40208680399 is a deficient number, since it is larger than the sum of its proper divisors (2910137).

40208680399 is a wasteful number, since it uses less digits than its factorization.

40208680399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2910136.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 40208680399 in words is "forty billion, two hundred eight million, six hundred eighty thousand, three hundred ninety-nine".