61278448604 has 6 divisors (see below), whose sum is σ = 107237285064. Its totient is φ = 30639224300.

The previous prime is 61278448589. The next prime is 61278448639. The reversal of 61278448604 is 40684487216.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7659806072 + ... + 7659806079.

It is an arithmetic number, because the mean of its divisors is an integer number (17872880844).

Almost surely, 2^61278448604 is an apocalyptic number.

It is an amenable number.

61278448604 is a deficient number, since it is larger than the sum of its proper divisors (45958836460).

61278448604 is a wasteful number, since it uses less digits than its factorization.

61278448604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15319612155 (or 15319612153 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 50.

The spelling of 61278448604 in words is "sixty-one billion, two hundred seventy-eight million, four hundred forty-eight thousand, six hundred four".