77954540271 has 4 divisors (see below), whose sum is σ = 103939387032. Its totient is φ = 51969693512.

The previous prime is 77954540249. The next prime is 77954540303. The reversal of 77954540271 is 17204545977.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77954540271 - 2⁵ = 77954540239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77954540171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12992423376 + ... + 12992423381.

It is an arithmetic number, because the mean of its divisors is an integer number (25984846758).

Almost surely, 2^77954540271 is an apocalyptic number.

77954540271 is a deficient number, since it is larger than the sum of its proper divisors (25984846761).

77954540271 is a wasteful number, since it uses less digits than its factorization.

77954540271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25984846760.

The product of its (nonzero) digits is 2469600, while the sum is 51.

The spelling of 77954540271 in words is "seventy-seven billion, nine hundred fifty-four million, five hundred forty thousand, two hundred seventy-one".