13771653440 has 28 divisors (see below), whose sum is σ = 32793750516. Its totient is φ = 5508661248.

The previous prime is 13771653383. The next prime is 13771653457. The reversal of 13771653440 is 4435617731.

It can be written as a sum of positive squares in 2 ways, for example, as 9237516544 + 4534136896 = 96112^2 + 67336^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21517889 + ... + 21518528.

Almost surely, 2^13771653440 is an apocalyptic number.

13771653440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13771653440 is an abundant number, since it is smaller than the sum of its proper divisors (19022097076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13771653440 is an equidigital number, since it uses as much as digits as its factorization.

13771653440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43036434 (or 43036424 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 41.

The spelling of 13771653440 in words is "thirteen billion, seven hundred seventy-one million, six hundred fifty-three thousand, four hundred forty".