1361815888 has 10 divisors (see below), whose sum is σ = 2638518314. Its totient is φ = 680907936.

The previous prime is 1361815877. The next prime is 1361815907. The reversal of 1361815888 is 8885181631.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1113690384 + 248125504 = 33372^2 + 15752^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42556731 + ... + 42556762.

Almost surely, 2^1361815888 is an apocalyptic number.

It is an amenable number.

1361815888 is a deficient number, since it is larger than the sum of its proper divisors (1276702426).

1361815888 is an equidigital number, since it uses as much as digits as its factorization.

1361815888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85113501 (or 85113495 counting only the distinct ones).

The product of its digits is 368640, while the sum is 49.

The square root of 1361815888 is about 36902.7897048448. The cubic root of 1361815888 is about 1108.4245398376.

The spelling of 1361815888 in words is "one billion, three hundred sixty-one million, eight hundred fifteen thousand, eight hundred eighty-eight".