77636422646 has 8 divisors (see below), whose sum is σ = 116456000160. Its totient is φ = 38817755928.

The previous prime is 77636422637. The next prime is 77636422663. The reversal of 77636422646 is 64622463677.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent 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, 56195 + ... + 398033.

It is an arithmetic number, because the mean of its divisors is an integer number (14557000020).

Almost surely, 2^77636422646 is an apocalyptic number.

77636422646 is a deficient number, since it is larger than the sum of its proper divisors (38819577514).

77636422646 is a wasteful number, since it uses less digits than its factorization.

77636422646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455398.

The product of its digits is 12192768, while the sum is 53.

The spelling of 77636422646 in words is "seventy-seven billion, six hundred thirty-six million, four hundred twenty-two thousand, six hundred forty-six".