63131976077 has 4 divisors (see below), whose sum is σ = 66454711680. Its totient is φ = 59809240476.

The previous prime is 63131976073. The next prime is 63131976091. The reversal of 63131976077 is 77067913136.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 63131976077 - 2² = 63131976073 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 (63131976073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1661367773 + ... + 1661367810.

It is an arithmetic number, because the mean of its divisors is an integer number (16613677920).

Almost surely, 2^63131976077 is an apocalyptic number.

It is an amenable number.

63131976077 is a deficient number, since it is larger than the sum of its proper divisors (3322735603).

63131976077 is a wasteful number, since it uses less digits than its factorization.

63131976077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3322735602.

The product of its (nonzero) digits is 1000188, while the sum is 50.

The spelling of 63131976077 in words is "sixty-three billion, one hundred thirty-one million, nine hundred seventy-six thousand, seventy-seven".