3581128494 has 48 divisors (see below), whose sum is σ = 8195725824. Its totient is φ = 1128330000.

The previous prime is 3581128483. The next prime is 3581128501. The reversal of 3581128494 is 4948211853.

3581128494 is a `hidden beast` number, since 3 + 581 + 1 + 28 + 49 + 4 = 666.

It is a super-3 number, since 3×3581128494³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50632 + ... + 98619.

It is an arithmetic number, because the mean of its divisors is an integer number (170744288).

Almost surely, 2^3581128494 is an apocalyptic number.

3581128494 is an abundant number, since it is smaller than the sum of its proper divisors (4614597330).

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

3581128494 is a wasteful number, since it uses less digits than its factorization.

3581128494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149333 (or 149330 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 3581128494 is about 59842.5308121239. The cubic root of 3581128494 is about 1529.9361321539.

The spelling of 3581128494 in words is "three billion, five hundred eighty-one million, one hundred twenty-eight thousand, four hundred ninety-four".