531194664 has 128 divisors (see below), whose sum is σ = 1783111680. Its totient is φ = 127353600.

The previous prime is 531194663. The next prime is 531194687. The reversal of 531194664 is 466491135.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (531194663) 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, 12969 + ... + 35079.

It is an arithmetic number, because the mean of its divisors is an integer number (13930560).

Almost surely, 2^531194664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531194664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (891555840).

531194664 is an abundant number, since it is smaller than the sum of its proper divisors (1251917016).

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

531194664 is a wasteful number, since it uses less digits than its factorization.

531194664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22151 (or 22147 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The square root of 531194664 is about 23047.6607055901. The cubic root of 531194664 is about 809.8748290043.

The spelling of 531194664 in words is "five hundred thirty-one million, one hundred ninety-four thousand, six hundred sixty-four".