77192217808 has 40 divisors (see below), whose sum is σ = 153807368000. Its totient is φ = 37509018624.

The previous prime is 77192217803. The next prime is 77192217841. The reversal of 77192217808 is 80871229177.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77192217803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144993 + ... + 418816.

It is an arithmetic number, because the mean of its divisors is an integer number (3845184200).

Almost surely, 2^77192217808 is an apocalyptic number.

It is an amenable number.

77192217808 is a deficient number, since it is larger than the sum of its proper divisors (76615150192).

77192217808 is a wasteful number, since it uses less digits than its factorization.

77192217808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564059 (or 564053 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 52.

The spelling of 77192217808 in words is "seventy-seven billion, one hundred ninety-two million, two hundred seventeen thousand, eight hundred eight".