128716661310 has 32 divisors (see below), whose sum is σ = 308948746752. Its totient is φ = 34321247520.

The previous prime is 128716661267. The next prime is 128716661323. The reversal of 128716661310 is 13166617821.

It is a super-2 number, since 2×128716661310² (a number of 23 digits) contains 22 as substring.

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, 137215 + ... + 525605.

It is an arithmetic number, because the mean of its divisors is an integer number (9654648336).

Almost surely, 2^128716661310 is an apocalyptic number.

128716661310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128716661310 is an abundant number, since it is smaller than the sum of its proper divisors (180232085442).

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

128716661310 is a wasteful number, since it uses less digits than its factorization.

128716661310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399448.

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 128716661310 in words is "one hundred twenty-eight billion, seven hundred sixteen million, six hundred sixty-one thousand, three hundred ten".