63477290809 has 3 divisors (see below), whose sum is σ = 63477542757. Its totient is φ = 63477038862.

The previous prime is 63477290783. The next prime is 63477290827. The reversal of 63477290809 is 90809277436.

The square root of 63477290809 is 251947.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 63477290809 - 2²⁷ = 63343073081 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63477290809.

It is not an unprimeable number, because it can be changed into a prime (63477291809) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 125974 + ... + 377920.

It is an arithmetic number, because the mean of its divisors is an integer number (21159180919).

Almost surely, 2^63477290809 is an apocalyptic number.

63477290809 is the 251947-th square number.

63477290809 is the 125974-th centered octagonal number.

It is an amenable number.

63477290809 is a deficient number, since it is larger than the sum of its proper divisors (251948).

63477290809 is an frugal number, since it uses more digits than its factorization.

63477290809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503894 (or 251947 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 63477290809 in words is "sixty-three billion, four hundred seventy-seven million, two hundred ninety thousand, eight hundred nine".