6417275978 has 4 divisors (see below), whose sum is σ = 9625913970. Its totient is φ = 3208637988.

The previous prime is 6417275971. The next prime is 6417276029. The reversal of 6417275978 is 8795727146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8795727146 = 2 ⋅4397863573.

It can be written as a sum of positive squares in only one way, i.e., 5432132209 + 985143769 = 73703^2 + 31387^2 .

It is not an unprimeable number, because it can be changed into a prime (6417275971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1604318993 + ... + 1604318996.

Almost surely, 2^6417275978 is an apocalyptic number.

6417275978 is a deficient number, since it is larger than the sum of its proper divisors (3208637992).

6417275978 is a wasteful number, since it uses less digits than its factorization.

6417275978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208637991.

The product of its digits is 5927040, while the sum is 56.

The square root of 6417275978 is about 80107.9020946124. The cubic root of 6417275978 is about 1858.3046155741.

The spelling of 6417275978 in words is "six billion, four hundred seventeen million, two hundred seventy-five thousand, nine hundred seventy-eight".