649848407039 has 4 divisors (see below), whose sum is σ = 699836746056. Its totient is φ = 599860068024.

The previous prime is 649848406969. The next prime is 649848407059. The reversal of 649848407039 is 930704848946.

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

It is a cyclic number.

It is not a de Polignac number, because 649848407039 - 2²⁰ = 649847358463 is a prime.

It is a super-2 number, since 2×649848407039² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649848407059) 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, 24994169489 + ... + 24994169514.

It is an arithmetic number, because the mean of its divisors is an integer number (174959186514).

Almost surely, 2^649848407039 is an apocalyptic number.

649848407039 is a deficient number, since it is larger than the sum of its proper divisors (49988339017).

649848407039 is a wasteful number, since it uses less digits than its factorization.

649848407039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49988339016.

The product of its (nonzero) digits is 41803776, while the sum is 62.

The spelling of 649848407039 in words is "six hundred forty-nine billion, eight hundred forty-eight million, four hundred seven thousand, thirty-nine".