167728765090 has 64 divisors (see below), whose sum is σ = 314220060000. Its totient is φ = 64416798720.

The previous prime is 167728765033. The next prime is 167728765097. The reversal of 167728765090 is 90567827761.

It can be written as a sum of positive squares in 16 ways, for example, as 8057396169 + 159671368921 = 89763^2 + 399589^2 .

It is not an unprimeable number, because it can be changed into a prime (167728765097) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6646216 + ... + 6671404.

Almost surely, 2^167728765090 is an apocalyptic number.

167728765090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

167728765090 is a deficient number, since it is larger than the sum of its proper divisors (146491294910).

167728765090 is a wasteful number, since it uses less digits than its factorization.

167728765090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25495.

The product of its (nonzero) digits is 8890560, while the sum is 58.

The spelling of 167728765090 in words is "one hundred sixty-seven billion, seven hundred twenty-eight million, seven hundred sixty-five thousand, ninety".