61506406 has 8 divisors (see below), whose sum is σ = 99356544. Its totient is φ = 28387560.

The previous prime is 61506397. The next prime is 61506421. The reversal of 61506406 is 60460516.

61506406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 1182790 + ... + 1182841.

It is an arithmetic number, because the mean of its divisors is an integer number (12419568).

Almost surely, 2^61506406 is an apocalyptic number.

61506406 is a deficient number, since it is larger than the sum of its proper divisors (37850138).

61506406 is a wasteful number, since it uses less digits than its factorization.

61506406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365646.

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

The square root of 61506406 is about 7842.6019916862. The cubic root of 61506406 is about 394.7360432745.

The spelling of 61506406 in words is "sixty-one million, five hundred six thousand, four hundred six".