102688512906 has 32 divisors (see below), whose sum is σ = 247070108160. Its totient is φ = 27795386736.

The previous prime is 102688512853. The next prime is 102688512907. The reversal of 102688512906 is 609215886201.

It is a super-3 number, since 3×102688512906³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (102688512907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64340376 + ... + 64341971.

It is an arithmetic number, because the mean of its divisors is an integer number (7720940880).

Almost surely, 2^102688512906 is an apocalyptic number.

102688512906 is an abundant number, since it is smaller than the sum of its proper divisors (144381595254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102688512906 is a wasteful number, since it uses less digits than its factorization.

102688512906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128682378.

The product of its (nonzero) digits is 414720, while the sum is 48.

The spelling of 102688512906 in words is "one hundred two billion, six hundred eighty-eight million, five hundred twelve thousand, nine hundred six".