53977847487 has 4 divisors (see below), whose sum is σ = 71970463320. Its totient is φ = 35985231656.

The previous prime is 53977847471. The next prime is 53977847563. The reversal of 53977847487 is 78474877935.

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 53977847487 - 2⁴ = 53977847471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53977847437) 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, 8996307912 + ... + 8996307917.

It is an arithmetic number, because the mean of its divisors is an integer number (17992615830).

Almost surely, 2^53977847487 is an apocalyptic number.

53977847487 is a deficient number, since it is larger than the sum of its proper divisors (17992615833).

53977847487 is a wasteful number, since it uses less digits than its factorization.

53977847487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17992615832.

The product of its digits is 331914240, while the sum is 69.

The spelling of 53977847487 in words is "fifty-three billion, nine hundred seventy-seven million, eight hundred forty-seven thousand, four hundred eighty-seven".