61561324 has 12 divisors (see below), whose sum is σ = 117526248. Its totient is φ = 27982400.

The previous prime is 61561321. The next prime is 61561327. The reversal of 61561324 is 42316516.

It is an interprime number because it is at equal distance from previous prime (61561321) and next prime (61561327).

It is a super-2 number, since 2×61561324² = 7579593225265952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61561292 and 61561301.

It is not an unprimeable number, because it can be changed into a prime (61561321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699517 + ... + 699604.

It is an arithmetic number, because the mean of its divisors is an integer number (9793854).

Almost surely, 2^61561324 is an apocalyptic number.

It is an amenable number.

61561324 is a deficient number, since it is larger than the sum of its proper divisors (55964924).

61561324 is a wasteful number, since it uses less digits than its factorization.

61561324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399136 (or 1399134 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 61561324 is about 7846.1024719283. The cubic root of 61561324 is about 394.8534926408.

The spelling of 61561324 in words is "sixty-one million, five hundred sixty-one thousand, three hundred twenty-four".