649636434346 has 4 divisors (see below), whose sum is σ = 974454651522. Its totient is φ = 324818217172.

The previous prime is 649636434313. The next prime is 649636434367. The reversal of 649636434346 is 643434636946.

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., 518559852321 + 131076582025 = 720111^2 + 362045^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162409108585 + ... + 162409108588.

Almost surely, 2^649636434346 is an apocalyptic number.

649636434346 is a deficient number, since it is larger than the sum of its proper divisors (324818217176).

649636434346 is a wasteful number, since it uses less digits than its factorization.

649636434346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324818217175.

The product of its digits is 80621568, while the sum is 58.

The spelling of 649636434346 in words is "six hundred forty-nine billion, six hundred thirty-six million, four hundred thirty-four thousand, three hundred forty-six".