405401215109 has 16 divisors (see below), whose sum is σ = 448434493056. Its totient is φ = 363433344000.

The previous prime is 405401215091. The next prime is 405401215123. The reversal of 405401215109 is 901512104504.

It is a cyclic number.

It is not a de Polignac number, because 405401215109 - 2¹² = 405401211013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405401215169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 663212 + ... + 1118325.

It is an arithmetic number, because the mean of its divisors is an integer number (28027155816).

Almost surely, 2^405401215109 is an apocalyptic number.

It is an amenable number.

405401215109 is a deficient number, since it is larger than the sum of its proper divisors (43033277947).

405401215109 is a wasteful number, since it uses less digits than its factorization.

405401215109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781836.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 405401215109 in words is "four hundred five billion, four hundred one million, two hundred fifteen thousand, one hundred nine".