40370918891999 has 2 divisors, whose sum is σ = 40370918892000. Its totient is φ = 40370918891998.

The previous prime is 40370918891977. The next prime is 40370918892041. The reversal of 40370918891999 is 99919881907304.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40370918891999 is a prime.

It is a super-2 number, since 2×40370918891999² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40370918891929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20185459445999 + 20185459446000.

It is an arithmetic number, because the mean of its divisors is an integer number (20185459446000).

Almost surely, 2^{40370918891999} is an apocalyptic number.

40370918891999 is a deficient number, since it is larger than the sum of its proper divisors (1).

40370918891999 is an equidigital number, since it uses as much as digits as its factorization.

40370918891999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317447424, while the sum is 77.

The spelling of 40370918891999 in words is "forty trillion, three hundred seventy billion, nine hundred eighteen million, eight hundred ninety-one thousand, nine hundred ninety-nine".