128257252504851 has 8 divisors (see below), whose sum is σ = 171415868749264. Its totient is φ = 85301735631840.

The previous prime is 128257252504831. The next prime is 128257252504859. The reversal of 128257252504851 is 158405252752821.

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

It is not a de Polignac number, because 128257252504851 - 2²² = 128257248310547 is a prime.

It is a super-2 number, since 2×128257252504851² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128257252504791 and 128257252504800.

It is not an unprimeable number, because it can be changed into a prime (128257252504859) 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, 50774841376 + ... + 50774843901.

It is an arithmetic number, because the mean of its divisors is an integer number (21426983593658).

Almost surely, 2^{128257252504851} is an apocalyptic number.

128257252504851 is a deficient number, since it is larger than the sum of its proper divisors (43158616244413).

128257252504851 is a wasteful number, since it uses less digits than its factorization.

128257252504851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101549685701.

The product of its (nonzero) digits is 17920000, while the sum is 57.

The spelling of 128257252504851 in words is "one hundred twenty-eight trillion, two hundred fifty-seven billion, two hundred fifty-two million, five hundred four thousand, eight hundred fifty-one".