128102257787833 has 4 divisors (see below), whose sum is σ = 146402580328960. Its totient is φ = 109801935246708.

The previous prime is 128102257787831. The next prime is 128102257787869. The reversal of 128102257787833 is 338787752201821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128102257787833 - 2¹ = 128102257787831 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128102257787831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9150161270553 + ... + 9150161270566.

It is an arithmetic number, because the mean of its divisors is an integer number (36600645082240).

Almost surely, 2^{128102257787833} is an apocalyptic number.

It is an amenable number.

128102257787833 is a deficient number, since it is larger than the sum of its proper divisors (18300322541127).

128102257787833 is an equidigital number, since it uses as much as digits as its factorization.

128102257787833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18300322541126.

The product of its (nonzero) digits is 63221760, while the sum is 64.

The spelling of 128102257787833 in words is "one hundred twenty-eight trillion, one hundred two billion, two hundred fifty-seven million, seven hundred eighty-seven thousand, eight hundred thirty-three".