40400121399 has 8 divisors (see below), whose sum is σ = 58763812992. Its totient is φ = 24484922040.

The previous prime is 40400121379. The next prime is 40400121431. The reversal of 40400121399 is 99312100404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40400121399 - 2⁵ = 40400121367 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 1224246103 = 40400121399 / (4 + 0 + 4 + 0 + 0 + 1 + 2 + 1 + 3 + 9 + 9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400121319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 612123019 + ... + 612123084.

It is an arithmetic number, because the mean of its divisors is an integer number (7345476624).

Almost surely, 2^40400121399 is an apocalyptic number.

40400121399 is a deficient number, since it is larger than the sum of its proper divisors (18363691593).

40400121399 is a wasteful number, since it uses less digits than its factorization.

40400121399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224246117.

The product of its (nonzero) digits is 7776, while the sum is 33.

The spelling of 40400121399 in words is "forty billion, four hundred million, one hundred twenty-one thousand, three hundred ninety-nine".