405545100454120 has 128 divisors (see below), whose sum is σ = 1066682121402240. Its totient is φ = 137123940720640.

The previous prime is 405545100454049. The next prime is 405545100454129. The reversal of 405545100454120 is 21454001545504.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (405545100454129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 325989157 + ... + 327230836.

It is an arithmetic number, because the mean of its divisors is an integer number (8333454073455).

Almost surely, 2^{405545100454120} is an apocalyptic number.

405545100454120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

405545100454120 is an abundant number, since it is smaller than the sum of its proper divisors (661137020948120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405545100454120 is a wasteful number, since it uses less digits than its factorization.

405545100454120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653220115 (or 653220111 counting only the distinct ones).

The product of its (nonzero) digits is 320000, while the sum is 40.

Adding to 405545100454120 its reverse (21454001545504), we get a palindrome (426999101999624).

The spelling of 405545100454120 in words is "four hundred five trillion, five hundred forty-five billion, one hundred million, four hundred fifty-four thousand, one hundred twenty".