405155555 has 8 divisors (see below), whose sum is σ = 555641952. Its totient is φ = 277820928.

The previous prime is 405155551. The next prime is 405155567. The reversal of 405155555 is 555551504.

It is a happy number.

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

It is not a de Polignac number, because 405155555 - 2² = 405155551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 11575873 = 405155555 / (4 + 0 + 5 + 1 + 5 + 5 + 5 + 5 + 5).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405155551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5787902 + ... + 5787971.

It is an arithmetic number, because the mean of its divisors is an integer number (69455244).

Almost surely, 2^405155555 is an apocalyptic number.

405155555 is a deficient number, since it is larger than the sum of its proper divisors (150486397).

405155555 is a wasteful number, since it uses less digits than its factorization.

405155555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11575885.

The product of its (nonzero) digits is 62500, while the sum is 35.

The square root of 405155555 is about 20128.4762215126. The cubic root of 405155555 is about 739.9583340309.

The spelling of 405155555 in words is "four hundred five million, one hundred fifty-five thousand, five hundred fifty-five".