581663142 has 24 divisors (see below), whose sum is σ = 1263525120. Its totient is φ = 193386960.

The previous prime is 581663129. The next prime is 581663191. The reversal of 581663142 is 241366185.

It is a happy number.

581663142 is a `hidden beast` number, since 5 + 8 + 16 + 631 + 4 + 2 = 666.

It is a super-2 number, since 2×581663142² = 676664021522624328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 581663097 and 581663106.

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, 34534 + ... + 48537.

It is an arithmetic number, because the mean of its divisors is an integer number (52646880).

Almost surely, 2^581663142 is an apocalyptic number.

581663142 is an abundant number, since it is smaller than the sum of its proper divisors (681861978).

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

581663142 is a wasteful number, since it uses less digits than its factorization.

581663142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83468 (or 83465 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 581663142 is about 24117.6935464401. The cubic root of 581663142 is about 834.7514490839.

The spelling of 581663142 in words is "five hundred eighty-one million, six hundred sixty-three thousand, one hundred forty-two".