77197836945 has 8 divisors (see below), whose sum is σ = 123516539136. Its totient is φ = 41172179696.

The previous prime is 77197836941. The next prime is 77197836959. The reversal of 77197836945 is 54963879177.

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

It is a cyclic number.

It is not a de Polignac number, because 77197836945 - 2² = 77197836941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77197836941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2573261217 + ... + 2573261246.

It is an arithmetic number, because the mean of its divisors is an integer number (15439567392).

Almost surely, 2^77197836945 is an apocalyptic number.

It is an amenable number.

77197836945 is a deficient number, since it is larger than the sum of its proper divisors (46318702191).

77197836945 is a wasteful number, since it uses less digits than its factorization.

77197836945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5146522471.

The product of its digits is 80015040, while the sum is 66.

The spelling of 77197836945 in words is "seventy-seven billion, one hundred ninety-seven million, eight hundred thirty-six thousand, nine hundred forty-five".