157205506706 has 4 divisors (see below), whose sum is σ = 235808260062. Its totient is φ = 78602753352.

The previous prime is 157205506681. The next prime is 157205506739. The reversal of 157205506706 is 607605502751.

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., 107167843225 + 50037663481 = 327365^2 + 223691^2 .

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, 39301376675 + ... + 39301376678.

Almost surely, 2^157205506706 is an apocalyptic number.

157205506706 is a deficient number, since it is larger than the sum of its proper divisors (78602753356).

157205506706 is an equidigital number, since it uses as much as digits as its factorization.

157205506706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78602753355.

The product of its (nonzero) digits is 441000, while the sum is 44.

The spelling of 157205506706 in words is "one hundred fifty-seven billion, two hundred five million, five hundred six thousand, seven hundred six".