61961478 has 8 divisors (see below), whose sum is σ = 123922968. Its totient is φ = 20653824.

The previous prime is 61961477. The next prime is 61961519. The reversal of 61961478 is 87416916.

61961478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

61961478 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61961477) 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 3 ways as a sum of consecutive naturals, for example, 5163451 + ... + 5163462.

It is an arithmetic number, because the mean of its divisors is an integer number (15490371).

Almost surely, 2^61961478 is an apocalyptic number.

61961478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61961478 is a wasteful number, since it uses less digits than its factorization.

61961478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10326918.

The product of its digits is 72576, while the sum is 42.

The square root of 61961478 is about 7871.5613444856. The cubic root of 61961478 is about 395.7071730711.

The spelling of 61961478 in words is "sixty-one million, nine hundred sixty-one thousand, four hundred seventy-eight".