61355907 has 16 divisors (see below), whose sum is σ = 96245280. Its totient is φ = 38497536.

The previous prime is 61355897. The next prime is 61355933. The reversal of 61355907 is 70955316.

It is a happy number.

61355907 is a `hidden beast` number, since 61 + 3 + 5 + 590 + 7 = 666.

61355907 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61355907 - 2⁴ = 61355891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61355947) 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 15 ways as a sum of consecutive naturals, for example, 66378 + ... + 67295.

It is an arithmetic number, because the mean of its divisors is an integer number (6015330).

Almost surely, 2^61355907 is an apocalyptic number.

61355907 is a deficient number, since it is larger than the sum of its proper divisors (34889373).

61355907 is a wasteful number, since it uses less digits than its factorization.

61355907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133699 (or 133693 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 61355907 is about 7833.0011489850. The cubic root of 61355907 is about 394.4138226369.

The spelling of 61355907 in words is "sixty-one million, three hundred fifty-five thousand, nine hundred seven".