13663031540 has 24 divisors (see below), whose sum is σ = 28976453352. Its totient is φ = 5411100800.

The previous prime is 13663031539. The next prime is 13663031561. The reversal of 13663031540 is 4513036631.

It can be written as a sum of positive squares in 4 ways, for example, as 2425759504 + 11237272036 = 49252^2 + 106006^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13663031497 and 13663031506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3379919 + ... + 3383958.

It is an arithmetic number, because the mean of its divisors is an integer number (1207352223).

Almost surely, 2^13663031540 is an apocalyptic number.

13663031540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13663031540 is an abundant number, since it is smaller than the sum of its proper divisors (15313421812).

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

13663031540 is a wasteful number, since it uses less digits than its factorization.

13663031540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6763987 (or 6763985 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 32.

The spelling of 13663031540 in words is "thirteen billion, six hundred sixty-three million, thirty-one thousand, five hundred forty".