1368171540 has 48 divisors (see below), whose sum is σ = 4256535360. Its totient is φ = 364845600.

The previous prime is 1368171527. The next prime is 1368171547. The reversal of 1368171540 is 451718631.

1368171540 is a `hidden beast` number, since 1 + 36 + 81 + 7 + 1 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1368171495 and 1368171504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368171547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1266286 + ... + 1267365.

It is an arithmetic number, because the mean of its divisors is an integer number (88677820).

Almost surely, 2^1368171540 is an apocalyptic number.

1368171540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1368171540 is an abundant number, since it is smaller than the sum of its proper divisors (2888363820).

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

1368171540 is a wasteful number, since it uses less digits than its factorization.

1368171540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2533669 (or 2533661 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 1368171540 is about 36988.8029003373. The cubic root of 1368171540 is about 1110.1462188680.

The spelling of 1368171540 in words is "one billion, three hundred sixty-eight million, one hundred seventy-one thousand, five hundred forty".