6432278738 has 4 divisors (see below), whose sum is σ = 9648418110. Its totient is φ = 3216139368.

The previous prime is 6432278737. The next prime is 6432278747. The reversal of 6432278738 is 8378722346.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6389284489 + 42994249 = 79933^2 + 6557^2 .

It is not an unprimeable number, because it can be changed into a prime (6432278737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1608069683 + ... + 1608069686.

Almost surely, 2^6432278738 is an apocalyptic number.

6432278738 is a deficient number, since it is larger than the sum of its proper divisors (3216139372).

6432278738 is a wasteful number, since it uses less digits than its factorization.

6432278738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216139371.

The product of its digits is 2709504, while the sum is 50.

The square root of 6432278738 is about 80201.4883777103. The cubic root of 6432278738 is about 1859.7516469963.

The spelling of 6432278738 in words is "six billion, four hundred thirty-two million, two hundred seventy-eight thousand, seven hundred thirty-eight".