13921771654 has 16 divisors (see below), whose sum is σ = 23867543808. Its totient is φ = 5966061192.

The previous prime is 13921771649. The next prime is 13921771739. The reversal of 13921771654 is 45617712931.

13921771654 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13921771654² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265887 + ... + 313909.

It is an arithmetic number, because the mean of its divisors is an integer number (1491721488).

Almost surely, 2^13921771654 is an apocalyptic number.

13921771654 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

13921771654 is a deficient number, since it is larger than the sum of its proper divisors (9945772154).

13921771654 is a wasteful number, since it uses less digits than its factorization.

13921771654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68739.

The product of its digits is 317520, while the sum is 46.

The spelling of 13921771654 in words is "thirteen billion, nine hundred twenty-one million, seven hundred seventy-one thousand, six hundred fifty-four".