396638501626 has 4 divisors (see below), whose sum is σ = 594957752442. Its totient is φ = 198319250812.

The previous prime is 396638501621. The next prime is 396638501653. The reversal of 396638501626 is 626105836693.

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., 396208561401 + 429940225 = 629451^2 + 20735^2 .

It is not an unprimeable number, because it can be changed into a prime (396638501621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99159625405 + ... + 99159625408.

Almost surely, 2^396638501626 is an apocalyptic number.

396638501626 is a deficient number, since it is larger than the sum of its proper divisors (198319250816).

396638501626 is a wasteful number, since it uses less digits than its factorization.

396638501626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198319250815.

The product of its (nonzero) digits is 8398080, while the sum is 55.

The spelling of 396638501626 in words is "three hundred ninety-six billion, six hundred thirty-eight million, five hundred one thousand, six hundred twenty-six".