531949133880 has 288 divisors, whose sum is σ = 1791557492400. Its totient is φ = 136881239040.

The previous prime is 531949133873. The next prime is 531949133917. The reversal of 531949133880 is 88331949135.

531949133880 is a `hidden beast` number, since 531 + 94 + 9 + 13 + 3 + 8 + 8 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 131116812 + ... + 131120868.

Almost surely, 2^531949133880 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 531949133880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (895778746200).

531949133880 is an abundant number, since it is smaller than the sum of its proper divisors (1259608358520).

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

531949133880 is a wasteful number, since it uses less digits than its factorization.

531949133880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4515 (or 4477 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 531949133880 in words is "five hundred thirty-one billion, nine hundred forty-nine million, one hundred thirty-three thousand, eight hundred eighty".