13820501600661 has 16 divisors (see below), whose sum is σ = 21060481769600. Its totient is φ = 7897178308608.

The previous prime is 13820501600651. The next prime is 13820501600663. The reversal of 13820501600661 is 16600610502831.

It is not a de Polignac number, because 13820501600661 - 2⁵ = 13820501600629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13820501600663) 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, 9788716 + ... + 11111253.

It is an arithmetic number, because the mean of its divisors is an integer number (1316280110600).

Almost surely, 2^{13820501600661} is an apocalyptic number.

It is an amenable number.

13820501600661 is a deficient number, since it is larger than the sum of its proper divisors (7239980168939).

13820501600661 is a wasteful number, since it uses less digits than its factorization.

13820501600661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20931468.

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 13820501600661 in words is "thirteen trillion, eight hundred twenty billion, five hundred one million, six hundred thousand, six hundred sixty-one".