61398844804 has 12 divisors (see below), whose sum is σ = 117215976528. Its totient is φ = 27908565800.

The previous prime is 61398844781. The next prime is 61398844849. The reversal of 61398844804 is 40844889316.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 697714102 + ... + 697714189.

It is an arithmetic number, because the mean of its divisors is an integer number (9767998044).

Almost surely, 2^61398844804 is an apocalyptic number.

It is an amenable number.

61398844804 is a deficient number, since it is larger than the sum of its proper divisors (55817131724).

61398844804 is a wasteful number, since it uses less digits than its factorization.

61398844804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395428306 (or 1395428304 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 55.

The spelling of 61398844804 in words is "sixty-one billion, three hundred ninety-eight million, eight hundred forty-four thousand, eight hundred four".