61670634978278 has 16 divisors (see below), whose sum is σ = 93750039725040. Its totient is φ = 30422137992576.

The previous prime is 61670634978181. The next prime is 61670634978319. The reversal of 61670634978278 is 87287943607616.

61670634978278 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 (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378982376 + ... + 379145067.

It is an arithmetic number, because the mean of its divisors is an integer number (5859377482815).

Almost surely, 2^{61670634978278} is an apocalyptic number.

61670634978278 is a deficient number, since it is larger than the sum of its proper divisors (32079404746762).

61670634978278 is a wasteful number, since it uses less digits than its factorization.

61670634978278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758127991.

The product of its (nonzero) digits is 1024192512, while the sum is 74.

The spelling of 61670634978278 in words is "sixty-one trillion, six hundred seventy billion, six hundred thirty-four million, nine hundred seventy-eight thousand, two hundred seventy-eight".