1280413992705 has 32 divisors (see below), whose sum is σ = 2120154428160. Its totient is φ = 659075639040.

The previous prime is 1280413992677. The next prime is 1280413992707. The reversal of 1280413992705 is 5072993140821.

It is not a de Polignac number, because 1280413992705 - 2²² = 1280409798401 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1280413992707) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 500815 + ... + 1676795.

It is an arithmetic number, because the mean of its divisors is an integer number (66254825880).

Almost surely, 2^{1280413992705} is an apocalyptic number.

1280413992705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1280413992705 is a deficient number, since it is larger than the sum of its proper divisors (839740435455).

1280413992705 is a wasteful number, since it uses less digits than its factorization.

1280413992705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178521.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 1280413992705 in words is "one trillion, two hundred eighty billion, four hundred thirteen million, nine hundred ninety-two thousand, seven hundred five".