61493478 has 16 divisors (see below), whose sum is σ = 123428016. Its totient is φ = 20424320.

The previous prime is 61493473. The next prime is 61493501. The reversal of 61493478 is 87439416.

61493478 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 not an unprimeable number, because it can be changed into a prime (61493473) 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 7 ways as a sum of consecutive naturals, for example, 16551 + ... + 19922.

It is an arithmetic number, because the mean of its divisors is an integer number (7714251).

Almost surely, 2^61493478 is an apocalyptic number.

61493478 is an abundant number, since it is smaller than the sum of its proper divisors (61934538).

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

61493478 is a wasteful number, since it uses less digits than its factorization.

61493478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36759.

The product of its digits is 145152, while the sum is 42.

The square root of 61493478 is about 7841.7777321217. Note that the first 4 decimals coincide. The cubic root of 61493478 is about 394.7083848809.

The spelling of 61493478 in words is "sixty-one million, four hundred ninety-three thousand, four hundred seventy-eight".