77621182849 has 16 divisors (see below), whose sum is σ = 89497552896. Its totient is φ = 65943244800.

The previous prime is 77621182829. The next prime is 77621182853. The reversal of 77621182849 is 94828112677.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77621182849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77621182849.

It is not an unprimeable number, because it can be changed into a prime (77621182829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 551584 + ... + 677854.

It is an arithmetic number, because the mean of its divisors is an integer number (5593597056).

Almost surely, 2^77621182849 is an apocalyptic number.

It is an amenable number.

77621182849 is a deficient number, since it is larger than the sum of its proper divisors (11876370047).

77621182849 is a wasteful number, since it uses less digits than its factorization.

77621182849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127056.

The product of its digits is 2709504, while the sum is 55.

The spelling of 77621182849 in words is "seventy-seven billion, six hundred twenty-one million, one hundred eighty-two thousand, eight hundred forty-nine".