13900535561 has 8 divisors (see below), whose sum is σ = 15377802048. Its totient is φ = 12458866000.

The previous prime is 13900535549. The next prime is 13900535591. The reversal of 13900535561 is 16553500931.

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

It is a cyclic number.

It is not a de Polignac number, because 13900535561 - 2¹⁰ = 13900534537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13900535521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8898410 + ... + 8899971.

It is an arithmetic number, because the mean of its divisors is an integer number (1922225256).

Almost surely, 2^13900535561 is an apocalyptic number.

13900535561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13900535561 is a deficient number, since it is larger than the sum of its proper divisors (1477266487).

13900535561 is a wasteful number, since it uses less digits than its factorization.

13900535561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17798463.

The product of its (nonzero) digits is 60750, while the sum is 38.

The spelling of 13900535561 in words is "thirteen billion, nine hundred million, five hundred thirty-five thousand, five hundred sixty-one".