61004646378 has 48 divisors (see below), whose sum is σ = 149835984480. Its totient is φ = 17782729632.

The previous prime is 61004646377. The next prime is 61004646427. The reversal of 61004646378 is 87364640016.

It is a happy number.

61004646378 is a `hidden beast` number, since 6 + 1 + 0 + 0 + 4 + 6 + 4 + 637 + 8 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (61004646377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6856176 + ... + 6865067.

It is an arithmetic number, because the mean of its divisors is an integer number (3121583010).

Almost surely, 2^61004646378 is an apocalyptic number.

61004646378 is an abundant number, since it is smaller than the sum of its proper divisors (88831338102).

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

61004646378 is a wasteful number, since it uses less digits than its factorization.

61004646378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13721283 (or 13721280 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 61004646378 in words is "sixty-one billion, four million, six hundred forty-six thousand, three hundred seventy-eight".