157730406206 has 4 divisors (see below), whose sum is σ = 236595609312. Its totient is φ = 78865203102.

The previous prime is 157730406199. The next prime is 157730406241. The reversal of 157730406206 is 602604037751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 602604037751 = 521 ⋅1156629631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39432601550 + ... + 39432601553.

It is an arithmetic number, because the mean of its divisors is an integer number (59148902328).

Almost surely, 2^157730406206 is an apocalyptic number.

157730406206 is a deficient number, since it is larger than the sum of its proper divisors (78865203106).

157730406206 is an equidigital number, since it uses as much as digits as its factorization.

157730406206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78865203105.

The product of its (nonzero) digits is 211680, while the sum is 41.

The spelling of 157730406206 in words is "one hundred fifty-seven billion, seven hundred thirty million, four hundred six thousand, two hundred six".