405229108981 has 4 divisors (see below), whose sum is σ = 414653041792. Its totient is φ = 395805176172.

The previous prime is 405229108961. The next prime is 405229109023. The reversal of 405229108981 is 189801922504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 405229108981 - 2⁷ = 405229108853 is a prime.

It is a super-2 number, since 2×405229108981² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405229108951) 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, 4711966341 + ... + 4711966426.

It is an arithmetic number, because the mean of its divisors is an integer number (103663260448).

Almost surely, 2^405229108981 is an apocalyptic number.

It is an amenable number.

405229108981 is a deficient number, since it is larger than the sum of its proper divisors (9423932811).

405229108981 is an equidigital number, since it uses as much as digits as its factorization.

405229108981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9423932810.

The product of its (nonzero) digits is 414720, while the sum is 49.

The spelling of 405229108981 in words is "four hundred five billion, two hundred twenty-nine million, one hundred eight thousand, nine hundred eighty-one".