61671878 has 24 divisors (see below), whose sum is σ = 98186256. Its totient is φ = 29044400.

The previous prime is 61671851. The next prime is 61671887. The reversal of 61671878 is 87817616.

61671878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 74708 + ... + 75528.

It is an arithmetic number, because the mean of its divisors is an integer number (4091094).

Almost surely, 2^61671878 is an apocalyptic number.

61671878 is a deficient number, since it is larger than the sum of its proper divisors (36514378).

61671878 is a wasteful number, since it uses less digits than its factorization.

61671878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940 (or 917 counting only the distinct ones).

The product of its digits is 112896, while the sum is 44.

The square root of 61671878 is about 7853.1444657538. The cubic root of 61671878 is about 395.0897152410.

The spelling of 61671878 in words is "sixty-one million, six hundred seventy-one thousand, eight hundred seventy-eight".