77653671612 has 192 divisors, whose sum is σ = 221908377600. Its totient is φ = 20829035520.

The previous prime is 77653671587. The next prime is 77653671617. The reversal of 77653671612 is 21617635677.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77653671617) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5919853 + ... + 5932955.

It is an arithmetic number, because the mean of its divisors is an integer number (1155772800).

Almost surely, 2^77653671612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77653671612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110954188800).

77653671612 is an abundant number, since it is smaller than the sum of its proper divisors (144254705988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77653671612 is a wasteful number, since it uses less digits than its factorization.

77653671612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13296 (or 13294 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 51.

The spelling of 77653671612 in words is "seventy-seven billion, six hundred fifty-three million, six hundred seventy-one thousand, six hundred twelve".