128610292981 has 8 divisors (see below), whose sum is σ = 133049167200. Its totient is φ = 124171687920.

The previous prime is 128610292873. The next prime is 128610293027. The reversal of 128610292981 is 189292016821.

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

It is a cyclic number.

It is not a de Polignac number, because 128610292981 - 2²¹ = 128608195829 is a prime.

It is a super-2 number, since 2×128610292981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128610290981) 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, 1635790 + ... + 1712608.

It is an arithmetic number, because the mean of its divisors is an integer number (16631145900).

Almost surely, 2^128610292981 is an apocalyptic number.

It is an amenable number.

128610292981 is a deficient number, since it is larger than the sum of its proper divisors (4438874219).

128610292981 is an equidigital number, since it uses as much as digits as its factorization.

128610292981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134579.

The product of its (nonzero) digits is 248832, while the sum is 49.

The spelling of 128610292981 in words is "one hundred twenty-eight billion, six hundred ten million, two hundred ninety-two thousand, nine hundred eighty-one".