128905683162494 has 32 divisors (see below), whose sum is σ = 228345307392000. Its totient is φ = 54545985257400.

The previous prime is 128905683162469. The next prime is 128905683162547. The reversal of 128905683162494 is 494261386509821.

It is a Curzon number.

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, 1189244282 + ... + 1189352669.

It is an arithmetic number, because the mean of its divisors is an integer number (7135790856000).

Almost surely, 2^{128905683162494} is an apocalyptic number.

128905683162494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

128905683162494 is a deficient number, since it is larger than the sum of its proper divisors (99439624229506).

128905683162494 is an equidigital number, since it uses as much as digits as its factorization.

128905683162494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2378597053 (or 2378597039 counting only the distinct ones).

The product of its (nonzero) digits is 179159040, while the sum is 68.

The spelling of 128905683162494 in words is "one hundred twenty-eight trillion, nine hundred five billion, six hundred eighty-three million, one hundred sixty-two thousand, four hundred ninety-four".