61623405 has 24 divisors (see below), whose sum is σ = 110499480. Its totient is φ = 31731840.

The previous prime is 61623391. The next prime is 61623407. The reversal of 61623405 is 50432616.

61623405 is a `hidden beast` number, since 616 + 2 + 3 + 40 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1855044 + 59768361 = 1362^2 + 7731^2 .

It is not a de Polignac number, because 61623405 - 2⁹ = 61622893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61623407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22306 + ... + 24915.

It is an arithmetic number, because the mean of its divisors is an integer number (4604145).

Almost surely, 2^61623405 is an apocalyptic number.

It is an amenable number.

61623405 is a deficient number, since it is larger than the sum of its proper divisors (48876075).

61623405 is a wasteful number, since it uses less digits than its factorization.

61623405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47261 (or 47258 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 61623405 is about 7850.0576431005. The cubic root of 61623405 is about 394.9861769451.

The spelling of 61623405 in words is "sixty-one million, six hundred twenty-three thousand, four hundred five".