61306445 has 16 divisors (see below), whose sum is σ = 77760000. Its totient is φ = 46271808.

The previous prime is 61306423. The next prime is 61306451. The reversal of 61306445 is 54460316.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61306445 - 2⁶ = 61306381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24356 + ... + 26754.

It is an arithmetic number, because the mean of its divisors is an integer number (4860000).

Almost surely, 2^61306445 is an apocalyptic number.

It is an amenable number.

61306445 is a deficient number, since it is larger than the sum of its proper divisors (16453555).

61306445 is a wasteful number, since it uses less digits than its factorization.

61306445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2692.

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

The square root of 61306445 is about 7829.8432295928. The cubic root of 61306445 is about 394.3078087145.

The spelling of 61306445 in words is "sixty-one million, three hundred six thousand, four hundred forty-five".