405265284879 has 64 divisors (see below), whose sum is σ = 670021524480. Its totient is φ = 212171581440.

The previous prime is 405265284869. The next prime is 405265284883. The reversal of 405265284879 is 978482562504.

It is not a de Polignac number, because 405265284879 - 2²⁰ = 405264236303 is a prime.

It is a super-2 number, since 2×405265284879² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405265284869) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43242064 + ... + 43251434.

It is an arithmetic number, because the mean of its divisors is an integer number (10469086320).

Almost surely, 2^405265284879 is an apocalyptic number.

405265284879 is a deficient number, since it is larger than the sum of its proper divisors (264756239601).

405265284879 is a wasteful number, since it uses less digits than its factorization.

405265284879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10560.

The product of its (nonzero) digits is 38707200, while the sum is 60.

The spelling of 405265284879 in words is "four hundred five billion, two hundred sixty-five million, two hundred eighty-four thousand, eight hundred seventy-nine".