61131678 has 16 divisors (see below), whose sum is σ = 124865280. Its totient is φ = 19943576.

The previous prime is 61131673. The next prime is 61131713. The reversal of 61131678 is 87613116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61131673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108108 + ... + 108671.

It is an arithmetic number, because the mean of its divisors is an integer number (7804080).

Almost surely, 2^61131678 is an apocalyptic number.

61131678 is an abundant number, since it is smaller than the sum of its proper divisors (63733602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61131678 is a wasteful number, since it uses less digits than its factorization.

61131678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216831.

The product of its digits is 6048, while the sum is 33.

The square root of 61131678 is about 7818.6749516782. The cubic root of 61131678 is about 393.9327661479.

The spelling of 61131678 in words is "sixty-one million, one hundred thirty-one thousand, six hundred seventy-eight".