1361544660 has 96 divisors (see below), whose sum is σ = 4841061120. Its totient is φ = 311209344.

The previous prime is 1361544649. The next prime is 1361544661. The reversal of 1361544660 is 664451631.

It is a happy number.

It is a super-2 number, since 2×1361544660² = 3707607722349031200, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361544661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176319 + ... + 183878.

It is an arithmetic number, because the mean of its divisors is an integer number (50427720).

Almost surely, 2^1361544660 is an apocalyptic number.

1361544660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1361544660 is an abundant number, since it is smaller than the sum of its proper divisors (3479516460).

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

1361544660 is a wasteful number, since it uses less digits than its factorization.

1361544660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360222 (or 360214 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1361544660 is about 36899.1146235245. The cubic root of 1361544660 is about 1108.3509479679.

The spelling of 1361544660 in words is "one billion, three hundred sixty-one million, five hundred forty-four thousand, six hundred sixty".