13745897780091 has 4 divisors (see below), whose sum is σ = 18327863706792. Its totient is φ = 9163931853392.

The previous prime is 13745897780089. The next prime is 13745897780201. The reversal of 13745897780091 is 19008779854731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13745897780091 - 2¹ = 13745897780089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13745897779998 and 13745897780025.

It is not an unprimeable number, because it can be changed into a prime (13745897710091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2290982963346 + ... + 2290982963351.

It is an arithmetic number, because the mean of its divisors is an integer number (4581965926698).

Almost surely, 2^{13745897780091} is an apocalyptic number.

13745897780091 is a deficient number, since it is larger than the sum of its proper divisors (4581965926701).

13745897780091 is an equidigital number, since it uses as much as digits as its factorization.

13745897780091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4581965926700.

The product of its (nonzero) digits is 106686720, while the sum is 69.

The spelling of 13745897780091 in words is "thirteen trillion, seven hundred forty-five billion, eight hundred ninety-seven million, seven hundred eighty thousand, ninety-one".