8425563477 has 8 divisors (see below), whose sum is σ = 11894913216. Its totient is φ = 5286628032.

The previous prime is 8425563449. The next prime is 8425563529. The reversal of 8425563477 is 7743655248.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8425563477 - 2¹⁸ = 8425301333 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 165207127 = 8425563477 / (8 + 4 + 2 + 5 + 5 + 6 + 3 + 4 + 7 + 7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8425563277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82603513 + ... + 82603614.

It is an arithmetic number, because the mean of its divisors is an integer number (1486864152).

Almost surely, 2^8425563477 is an apocalyptic number.

It is an amenable number.

8425563477 is a deficient number, since it is larger than the sum of its proper divisors (3469349739).

8425563477 is a wasteful number, since it uses less digits than its factorization.

8425563477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165207147.

The product of its digits is 5644800, while the sum is 51.

The square root of 8425563477 is about 91790.8681569142. The cubic root of 8425563477 is about 2034.8527383894.

The spelling of 8425563477 in words is "eight billion, four hundred twenty-five million, five hundred sixty-three thousand, four hundred seventy-seven".