61471878 has 32 divisors (see below), whose sum is σ = 139372800. Its totient is φ = 17918496.

The previous prime is 61471873. The next prime is 61471889. The reversal of 61471878 is 87817416.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61471873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19258 + ... + 22221.

It is an arithmetic number, because the mean of its divisors is an integer number (4355400).

Almost surely, 2^61471878 is an apocalyptic number.

61471878 is an abundant number, since it is smaller than the sum of its proper divisors (77900922).

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

61471878 is a wasteful number, since it uses less digits than its factorization.

61471878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41516.

The product of its digits is 75264, while the sum is 42.

The square root of 61471878 is about 7840.4003724300. The cubic root of 61471878 is about 394.6621648057.

The spelling of 61471878 in words is "sixty-one million, four hundred seventy-one thousand, eight hundred seventy-eight".