158641786438 has 8 divisors (see below), whose sum is σ = 237974061888. Its totient is φ = 79317099144.

The previous prime is 158641786427. The next prime is 158641786483. The reversal of 158641786438 is 834687146851.

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

It is a congruent number.

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, 1844481 + ... + 1928572.

It is an arithmetic number, because the mean of its divisors is an integer number (29746757736).

Almost surely, 2^158641786438 is an apocalyptic number.

158641786438 is a deficient number, since it is larger than the sum of its proper divisors (79332275450).

158641786438 is a wasteful number, since it uses less digits than its factorization.

158641786438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3794078.

The product of its digits is 30965760, while the sum is 61.

The spelling of 158641786438 in words is "one hundred fifty-eight billion, six hundred forty-one million, seven hundred eighty-six thousand, four hundred thirty-eight".