178993210442 has 8 divisors (see below), whose sum is σ = 268503304836. Its totient is φ = 89492108832.

The previous prime is 178993210423. The next prime is 178993210463. The reversal of 178993210442 is 244012399871.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 164568960241 + 14424250201 = 405671^2 + 120101^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2198213 + ... + 2278184.

Almost surely, 2^178993210442 is an apocalyptic number.

178993210442 is a deficient number, since it is larger than the sum of its proper divisors (89510094394).

178993210442 is a wasteful number, since it uses less digits than its factorization.

178993210442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4496392.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 178993210442 in words is "one hundred seventy-eight billion, nine hundred ninety-three million, two hundred ten thousand, four hundred forty-two".