13771609997509 has 32 divisors (see below), whose sum is σ = 17019446614016. Its totient is φ = 10851425807040.

The previous prime is 13771609997501. The next prime is 13771609997573. The reversal of 13771609997509 is 90579990617731.

It is not a de Polignac number, because 13771609997509 - 2³ = 13771609997501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13771609997501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32503744 + ... + 32924710.

It is an arithmetic number, because the mean of its divisors is an integer number (531857706688).

Almost surely, 2^{13771609997509} is an apocalyptic number.

It is an amenable number.

13771609997509 is a deficient number, since it is larger than the sum of its proper divisors (3247836616507).

13771609997509 is a wasteful number, since it uses less digits than its factorization.

13771609997509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422465.

The product of its (nonzero) digits is 202538070, while the sum is 73.

The spelling of 13771609997509 in words is "thirteen trillion, seven hundred seventy-one billion, six hundred nine million, nine hundred ninety-seven thousand, five hundred nine".