61640107804 has 12 divisors (see below), whose sum is σ = 117676569528. Its totient is φ = 28018230800.

The previous prime is 61640107787. The next prime is 61640107817. The reversal of 61640107804 is 40870104616.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 700455727 + ... + 700455814.

It is an arithmetic number, because the mean of its divisors is an integer number (9806380794).

Almost surely, 2^61640107804 is an apocalyptic number.

It is an amenable number.

61640107804 is a deficient number, since it is larger than the sum of its proper divisors (56036461724).

61640107804 is a wasteful number, since it uses less digits than its factorization.

61640107804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400911556 (or 1400911554 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 61640107804 in words is "sixty-one billion, six hundred forty million, one hundred seven thousand, eight hundred four".