82139510040 has 64 divisors (see below), whose sum is σ = 281621180160. Its totient is φ = 18774744960.

The previous prime is 82139510039. The next prime is 82139510051. The reversal of 82139510040 is 4001593128.

It is a super-2 number, since 2×82139510040² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 82139509983 and 82139510010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48891726 + ... + 48893405.

It is an arithmetic number, because the mean of its divisors is an integer number (4400330940).

Almost surely, 2^82139510040 is an apocalyptic number.

It is an amenable number.

82139510040 is an abundant number, since it is smaller than the sum of its proper divisors (199481670120).

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

82139510040 is a wasteful number, since it uses less digits than its factorization.

82139510040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97785152 (or 97785148 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 82139510040 in words is "eighty-two billion, one hundred thirty-nine million, five hundred ten thousand, forty".