128465133848520 has 96 divisors (see below), whose sum is σ = 448317099777600. Its totient is φ = 29363459164032.

The previous prime is 128465133848509. The next prime is 128465133848539. The reversal of 128465133848520 is 25848331564821.

It is a happy number.

It is a super-2 number, since 2×128465133848520² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10923900060 + ... + 10923911819.

It is an arithmetic number, because the mean of its divisors is an integer number (4669969789350).

Almost surely, 2^{128465133848520} is an apocalyptic number.

128465133848520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128465133848520 is an abundant number, since it is smaller than the sum of its proper divisors (319851965929080).

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

128465133848520 is a wasteful number, since it uses less digits than its factorization.

128465133848520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21847811907 (or 21847811896 counting only the distinct ones).

The product of its (nonzero) digits is 44236800, while the sum is 60.

The spelling of 128465133848520 in words is "one hundred twenty-eight trillion, four hundred sixty-five billion, one hundred thirty-three million, eight hundred forty-eight thousand, five hundred twenty".