8638413477 has 4 divisors (see below), whose sum is σ = 11517884640. Its totient is φ = 5758942316.

The previous prime is 8638413461. The next prime is 8638413571. The reversal of 8638413477 is 7743148368.

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 8638413477 - 2⁴ = 8638413461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8638413437) 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, 1439735577 + ... + 1439735582.

It is an arithmetic number, because the mean of its divisors is an integer number (2879471160).

Almost surely, 2^8638413477 is an apocalyptic number.

It is an amenable number.

8638413477 is a deficient number, since it is larger than the sum of its proper divisors (2879471163).

8638413477 is a wasteful number, since it uses less digits than its factorization.

8638413477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2879471162.

The product of its digits is 2709504, while the sum is 51.

The square root of 8638413477 is about 92943.0657822304. The cubic root of 8638413477 is about 2051.8455303528.

The spelling of 8638413477 in words is "eight billion, six hundred thirty-eight million, four hundred thirteen thousand, four hundred seventy-seven".