61553907 has 6 divisors (see below), whose sum is σ = 88911212. Its totient is φ = 41035932.

The previous prime is 61553897. The next prime is 61553927. The reversal of 61553907 is 70935516.

It is a happy number.

61553907 is a `hidden beast` number, since 615 + 5 + 39 + 0 + 7 = 666.

It is not a de Polignac number, because 61553907 - 2¹⁵ = 61521139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61553927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3419653 + ... + 3419670.

Almost surely, 2^61553907 is an apocalyptic number.

61553907 is a deficient number, since it is larger than the sum of its proper divisors (27357305).

61553907 is a wasteful number, since it uses less digits than its factorization.

61553907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6839329 (or 6839326 counting only the distinct ones).

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

The square root of 61553907 is about 7845.6298026353. The cubic root of 61553907 is about 394.8376344916.

The spelling of 61553907 in words is "sixty-one million, five hundred fifty-three thousand, nine hundred seven".