77681196 has 54 divisors (see below), whose sum is σ = 207310740. Its totient is φ = 24458112.

The previous prime is 77681179. The next prime is 77681203. The reversal of 77681196 is 69118677.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 230340 + ... + 230676.

Almost surely, 2^77681196 is an apocalyptic number.

77681196 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77681196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103655370).

77681196 is an abundant number, since it is smaller than the sum of its proper divisors (129629544).

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

77681196 is a wasteful number, since it uses less digits than its factorization.

77681196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703 (or 361 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 77681196 is about 8813.6936638392. The cubic root of 77681196 is about 426.6829618885.

It can be divided in two parts, 77681 and 196, that added together give a palindrome (77877).

The spelling of 77681196 in words is "seventy-seven million, six hundred eighty-one thousand, one hundred ninety-six".