61616407 has 4 divisors (see below), whose sum is σ = 61673976. Its totient is φ = 61558840.

The previous prime is 61616393. The next prime is 61616413. The reversal of 61616407 is 70461616.

61616407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61616407 is a prime.

It is a super-2 number, since 2×61616407² = 7593163223179298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61616497) by changing a digit.

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, 27148 + ... + 29329.

It is an arithmetic number, because the mean of its divisors is an integer number (15418494).

Almost surely, 2^61616407 is an apocalyptic number.

61616407 is a deficient number, since it is larger than the sum of its proper divisors (57569).

61616407 is a wasteful number, since it uses less digits than its factorization.

61616407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57568.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 61616407 is about 7849.6119012344. The cubic root of 61616407 is about 394.9712247371.

The spelling of 61616407 in words is "sixty-one million, six hundred sixteen thousand, four hundred seven".