158638902393 has 16 divisors (see below), whose sum is σ = 212759850240. Its totient is φ = 105140379264.

The previous prime is 158638902343. The next prime is 158638902403. The reversal of 158638902393 is 393209836851.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-158638902393 is a prime.

It is a super-2 number, since 2×158638902393² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (158638902343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138880 + ... + 580142.

It is an arithmetic number, because the mean of its divisors is an integer number (13297490640).

Almost surely, 2^158638902393 is an apocalyptic number.

It is an amenable number.

158638902393 is a deficient number, since it is larger than the sum of its proper divisors (54120947847).

158638902393 is a wasteful number, since it uses less digits than its factorization.

158638902393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441968.

The product of its (nonzero) digits is 8398080, while the sum is 57.

The spelling of 158638902393 in words is "one hundred fifty-eight billion, six hundred thirty-eight million, nine hundred two thousand, three hundred ninety-three".