128262278751420 has 48 divisors (see below), whose sum is σ = 391782960551808. Its totient is φ = 31093885757760.

The previous prime is 128262278751361. The next prime is 128262278751433. The reversal of 128262278751420 is 24157872262821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97168392334 + ... + 97168393653.

It is an arithmetic number, because the mean of its divisors is an integer number (8162145011496).

Almost surely, 2^{128262278751420} is an apocalyptic number.

128262278751420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128262278751420 is an abundant number, since it is smaller than the sum of its proper divisors (263520681800388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128262278751420 is a wasteful number, since it uses less digits than its factorization.

128262278751420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194336786010 (or 194336786008 counting only the distinct ones).

The product of its (nonzero) digits is 12042240, while the sum is 57.

The spelling of 128262278751420 in words is "one hundred twenty-eight trillion, two hundred sixty-two billion, two hundred seventy-eight million, seven hundred fifty-one thousand, four hundred twenty".