13873777461505 has 8 divisors (see below), whose sum is σ = 17929189334952. Its totient is φ = 10245251048448.

The previous prime is 13873777461461. The next prime is 13873777461517. The reversal of 13873777461505 is 50516477737831.

It is a Cunningham number, because it is equal to 3724752²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 2052331299216 + 11821446162289 = 1432596^2 + 3438233^2 .

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

It is not a de Polignac number, because 13873777461505 - 2³⁵ = 13839417723137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106721365024 + ... + 106721365153.

It is an arithmetic number, because the mean of its divisors is an integer number (2241148666869).

Almost surely, 2^{13873777461505} is an apocalyptic number.

It is an amenable number.

13873777461505 is a deficient number, since it is larger than the sum of its proper divisors (4055411873447).

13873777461505 is a wasteful number, since it uses less digits than its factorization.

13873777461505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213442730195.

The product of its (nonzero) digits is 103723200, while the sum is 64.

The spelling of 13873777461505 in words is "thirteen trillion, eight hundred seventy-three billion, seven hundred seventy-seven million, four hundred sixty-one thousand, five hundred five".