77681573404486 has 32 divisors (see below), whose sum is σ = 125707431836160. Its totient is φ = 35886372899616.

The previous prime is 77681573404399. The next prime is 77681573404493. The reversal of 77681573404486 is 68440437518677.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76340361 + ... + 77351236.

It is an arithmetic number, because the mean of its divisors is an integer number (3928357244880).

Almost surely, 2^{77681573404486} is an apocalyptic number.

77681573404486 is a deficient number, since it is larger than the sum of its proper divisors (48025858431674).

77681573404486 is a wasteful number, since it uses less digits than its factorization.

77681573404486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153691948.

The product of its (nonzero) digits is 758661120, while the sum is 70.

The spelling of 77681573404486 in words is "seventy-seven trillion, six hundred eighty-one billion, five hundred seventy-three million, four hundred four thousand, four hundred eighty-six".