561362157 has 20 divisors (see below), whose sum is σ = 839514940. Its totient is φ = 373823424.

The previous prime is 561362129. The next prime is 561362159. The reversal of 561362157 is 751263165.

It can be written as a sum of positive squares in 2 ways, for example, as 474760521 + 86601636 = 21789^2 + 9306^2 .

It is not a de Polignac number, because 561362157 - 2⁶ = 561362093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561362159) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 80319 + ... + 87027.

It is an arithmetic number, because the mean of its divisors is an integer number (41975747).

Almost surely, 2^561362157 is an apocalyptic number.

It is an amenable number.

561362157 is a deficient number, since it is larger than the sum of its proper divisors (278152783).

561362157 is a wasteful number, since it uses less digits than its factorization.

561362157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7754 (or 7745 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 561362157 is about 23693.0824714726. The cubic root of 561362157 is about 824.9248328210.

The spelling of 561362157 in words is "five hundred sixty-one million, three hundred sixty-two thousand, one hundred fifty-seven".