71154505477 has 4 divisors (see below), whose sum is σ = 77623096896. Its totient is φ = 64685914060.

The previous prime is 71154505403. The next prime is 71154505481. The reversal of 71154505477 is 77450545117.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77450545117 = 11 ⋅7040958647.

It is a cyclic number.

It is not a de Polignac number, because 71154505477 - 2⁷ = 71154505349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71154505577) 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, 3234295693 + ... + 3234295714.

It is an arithmetic number, because the mean of its divisors is an integer number (19405774224).

Almost surely, 2^71154505477 is an apocalyptic number.

It is an amenable number.

71154505477 is a deficient number, since it is larger than the sum of its proper divisors (6468591419).

71154505477 is a wasteful number, since it uses less digits than its factorization.

71154505477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6468591418.

The product of its (nonzero) digits is 686000, while the sum is 46.

The spelling of 71154505477 in words is "seventy-one billion, one hundred fifty-four million, five hundred five thousand, four hundred seventy-seven".