158445720746 has 4 divisors (see below), whose sum is σ = 237668581122. Its totient is φ = 79222860372.

The previous prime is 158445720731. The next prime is 158445720767. The reversal of 158445720746 is 647027544851.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 141982008025 + 16463712721 = 376805^2 + 128311^2 .

It is a super-3 number, since 3×158445720746³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39611430185 + ... + 39611430188.

Almost surely, 2^158445720746 is an apocalyptic number.

158445720746 is a deficient number, since it is larger than the sum of its proper divisors (79222860376).

158445720746 is an equidigital number, since it uses as much as digits as its factorization.

158445720746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79222860375.

The product of its (nonzero) digits is 7526400, while the sum is 53.

The spelling of 158445720746 in words is "one hundred fifty-eight billion, four hundred forty-five million, seven hundred twenty thousand, seven hundred forty-six".