164391787010 has 24 divisors (see below), whose sum is σ = 325251190908. Its totient is φ = 59778831200.

The previous prime is 164391787003. The next prime is 164391787033. The reversal of 164391787010 is 10787193461.

It can be written as a sum of positive squares in 2 ways, for example, as 152601953449 + 11789833561 = 390643^2 + 108581^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67929281 + ... + 67931700.

Almost surely, 2^164391787010 is an apocalyptic number.

164391787010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164391787010 is a deficient number, since it is larger than the sum of its proper divisors (160859403898).

164391787010 is a wasteful number, since it uses less digits than its factorization.

164391787010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135861010 (or 135860999 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 47.

The spelling of 164391787010 in words is "one hundred sixty-four billion, three hundred ninety-one million, seven hundred eighty-seven thousand, ten".