157725346442 has 4 divisors (see below), whose sum is σ = 236588019666. Its totient is φ = 78862673220.

The previous prime is 157725346439. The next prime is 157725346451. The reversal of 157725346442 is 244643527751.

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., 93893829241 + 63831517201 = 306421^2 + 252649^2 .

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, 39431336609 + ... + 39431336612.

Almost surely, 2^157725346442 is an apocalyptic number.

157725346442 is a deficient number, since it is larger than the sum of its proper divisors (78862673224).

157725346442 is an equidigital number, since it uses as much as digits as its factorization.

157725346442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78862673223.

The product of its digits is 5644800, while the sum is 50.

The spelling of 157725346442 in words is "one hundred fifty-seven billion, seven hundred twenty-five million, three hundred forty-six thousand, four hundred forty-two".