61356404 has 12 divisors (see below), whose sum is σ = 109400004. Its totient is φ = 30099264.

The previous prime is 61356359. The next prime is 61356413. The reversal of 61356404 is 40465316.

It is a happy number.

61356404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 38812900 + 22543504 = 6230^2 + 4748^2 .

It is a super-2 number, since 2×61356404² = 7529216623622432, which contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 144497 + ... + 144920.

It is an arithmetic number, because the mean of its divisors is an integer number (9116667).

Almost surely, 2^61356404 is an apocalyptic number.

It is an amenable number.

61356404 is a deficient number, since it is larger than the sum of its proper divisors (48043600).

61356404 is a wasteful number, since it uses less digits than its factorization.

61356404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289474 (or 289472 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 61356404 is about 7833.0328736703. The cubic root of 61356404 is about 394.4148875882.

The spelling of 61356404 in words is "sixty-one million, three hundred fifty-six thousand, four hundred four".