101781871870782 has 64 divisors (see below), whose sum is σ = 215417292480000. Its totient is φ = 31970787982848.

The previous prime is 101781871870753. The next prime is 101781871870799. The reversal of 101781871870782 is 287078178187101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77227594 + ... + 78534482.

It is an arithmetic number, because the mean of its divisors is an integer number (3365895195000).

Almost surely, 2^{101781871870782} is an apocalyptic number.

101781871870782 is an abundant number, since it is smaller than the sum of its proper divisors (113635420609218).

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

101781871870782 is a wasteful number, since it uses less digits than its factorization.

101781871870782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310545.

The product of its (nonzero) digits is 19668992, while the sum is 66.

The spelling of 101781871870782 in words is "one hundred one trillion, seven hundred eighty-one billion, eight hundred seventy-one million, eight hundred seventy thousand, seven hundred eighty-two".