128571719523 has 8 divisors (see below), whose sum is σ = 184615802448. Its totient is φ = 79121058144.

The previous prime is 128571719509. The next prime is 128571719539. The reversal of 128571719523 is 325917175821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128571719523 - 2⁶ = 128571719459 is a prime.

It is a super-2 number, since 2×128571719523² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128571719123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1648355340 + ... + 1648355417.

It is an arithmetic number, because the mean of its divisors is an integer number (23076975306).

Almost surely, 2^128571719523 is an apocalyptic number.

128571719523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

128571719523 is a deficient number, since it is larger than the sum of its proper divisors (56044082925).

128571719523 is a wasteful number, since it uses less digits than its factorization.

128571719523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3296710773.

The product of its digits is 1058400, while the sum is 51.

The spelling of 128571719523 in words is "one hundred twenty-eight billion, five hundred seventy-one million, seven hundred nineteen thousand, five hundred twenty-three".