77147072811 has 32 divisors (see below), whose sum is σ = 119355793920. Its totient is φ = 49156205472.

The previous prime is 77147072803. The next prime is 77147072831. The reversal of 77147072811 is 11827074177.

It is not a de Polignac number, because 77147072811 - 2³ = 77147072803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77147072831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 744376 + ... + 841658.

It is an arithmetic number, because the mean of its divisors is an integer number (3729868560).

Almost surely, 2^77147072811 is an apocalyptic number.

77147072811 is a deficient number, since it is larger than the sum of its proper divisors (42208721109).

77147072811 is a wasteful number, since it uses less digits than its factorization.

77147072811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98592 (or 98586 counting only the distinct ones).

The product of its (nonzero) digits is 153664, while the sum is 45.

The spelling of 77147072811 in words is "seventy-seven billion, one hundred forty-seven million, seventy-two thousand, eight hundred eleven".