128975641539 has 8 divisors (see below), whose sum is σ = 171969230592. Its totient is φ = 85982906760.

The previous prime is 128975641537. The next prime is 128975641541. The reversal of 128975641539 is 935146579821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128975641537) and next prime (128975641541).

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

It is not a de Polignac number, because 128975641539 - 2¹ = 128975641537 is a prime.

It is a super-2 number, since 2×128975641539² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128975641537) 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, 354802 + ... + 619544.

It is an arithmetic number, because the mean of its divisors is an integer number (21496153824).

Almost surely, 2^128975641539 is an apocalyptic number.

128975641539 is a deficient number, since it is larger than the sum of its proper divisors (42993589053).

128975641539 is a wasteful number, since it uses less digits than its factorization.

128975641539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427137.

The product of its digits is 16329600, while the sum is 60.

The spelling of 128975641539 in words is "one hundred twenty-eight billion, nine hundred seventy-five million, six hundred forty-one thousand, five hundred thirty-nine".