561380138 has 16 divisors (see below), whose sum is σ = 928946880. Its totient is φ = 252304800.

The previous prime is 561380129. The next prime is 561380153. The reversal of 561380138 is 831083165.

It is a junction number, because it is equal to n+sod(n) for n = 561380098 and 561380107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141398 + ... + 145313.

It is an arithmetic number, because the mean of its divisors is an integer number (58059180).

Almost surely, 2^561380138 is an apocalyptic number.

561380138 is a deficient number, since it is larger than the sum of its proper divisors (367566742).

561380138 is a wasteful number, since it uses less digits than its factorization.

561380138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286813.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 561380138 is about 23693.4619251810. The cubic root of 561380138 is about 824.9336404537.

The spelling of 561380138 in words is "five hundred sixty-one million, three hundred eighty thousand, one hundred thirty-eight".