158621700434 has 4 divisors (see below), whose sum is σ = 237932550654. Its totient is φ = 79310850216.

The previous prime is 158621700407. The next prime is 158621700439. The reversal of 158621700434 is 434007126851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434007126851 = 49459 ⋅8775089.

It can be written as a sum of positive squares in only one way, i.e., 129603600025 + 29018100409 = 360005^2 + 170347^2 .

It is a junction number, because it is equal to n+sod(n) for n = 158621700391 and 158621700400.

It is not an unprimeable number, because it can be changed into a prime (158621700439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39655425107 + ... + 39655425110.

Almost surely, 2^158621700434 is an apocalyptic number.

158621700434 is a deficient number, since it is larger than the sum of its proper divisors (79310850220).

158621700434 is an equidigital number, since it uses as much as digits as its factorization.

158621700434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79310850219.

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 158621700434 in words is "one hundred fifty-eight billion, six hundred twenty-one million, seven hundred thousand, four hundred thirty-four".