1209860838769 has 16 divisors (see below), whose sum is σ = 1397344639680. Its totient is φ = 1035962343360.

The previous prime is 1209860838653. The next prime is 1209860838773. The reversal of 1209860838769 is 9678380689021.

It is a cyclic number.

It is not a de Polignac number, because 1209860838769 - 2³⁹ = 660105024881 is a prime.

It is a super-2 number, since 2×1209860838769² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1209860838779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16694502 + ... + 16766815.

It is an arithmetic number, because the mean of its divisors is an integer number (87334039980).

Almost surely, 2^{1209860838769} is an apocalyptic number.

1209860838769 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1209860838769 is a deficient number, since it is larger than the sum of its proper divisors (187483800911).

1209860838769 is a wasteful number, since it uses less digits than its factorization.

1209860838769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33461520.

The product of its (nonzero) digits is 62705664, while the sum is 67.

The spelling of 1209860838769 in words is "one trillion, two hundred nine billion, eight hundred sixty million, eight hundred thirty-eight thousand, seven hundred sixty-nine".