61906145 has 8 divisors (see below), whose sum is σ = 84899904. Its totient is φ = 42449904.

The previous prime is 61906139. The next prime is 61906171. The reversal of 61906145 is 54160916.

61906145 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 not a de Polignac number, because 61906145 - 2⁶ = 61906081 is a prime.

It is a super-2 number, since 2×61906145² = 7664741577522050, which contains 22 as substring.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 884339 + ... + 884408.

It is an arithmetic number, because the mean of its divisors is an integer number (10612488).

Almost surely, 2^61906145 is an apocalyptic number.

It is an amenable number.

61906145 is a deficient number, since it is larger than the sum of its proper divisors (22993759).

61906145 is a wasteful number, since it uses less digits than its factorization.

61906145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768759.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 61906145 is about 7868.0458183719. The cubic root of 61906145 is about 395.5893461743.

The spelling of 61906145 in words is "sixty-one million, nine hundred six thousand, one hundred forty-five".