6405156252 has 36 divisors (see below), whose sum is σ = 17662704696. Its totient is φ = 1940956320.

The previous prime is 6405156239. The next prime is 6405156271. The reversal of 6405156252 is 2526515046.

6405156252 is a `hidden beast` number, since 6 + 40 + 5 + 1 + 562 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×6405156252² = 82052053225069375008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8086923 + ... + 8087714.

It is an arithmetic number, because the mean of its divisors is an integer number (490630686).

Almost surely, 2^6405156252 is an apocalyptic number.

It is an amenable number.

6405156252 is an abundant number, since it is smaller than the sum of its proper divisors (11257548444).

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

6405156252 is a wasteful number, since it uses less digits than its factorization.

6405156252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16174658 (or 16174653 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 6405156252 is about 80032.2200866626. The cubic root of 6405156252 is about 1857.1340079702.

The spelling of 6405156252 in words is "six billion, four hundred five million, one hundred fifty-six thousand, two hundred fifty-two".