649362587369 has 4 divisors (see below), whose sum is σ = 687560386644. Its totient is φ = 611164788096.

The previous prime is 649362587359. The next prime is 649362587381. The reversal of 649362587369 is 963785263946.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 398874349225 + 250488238144 = 631565^2 + 500488^2 .

It is not a de Polignac number, because 649362587369 - 2¹⁶ = 649362521833 is a prime.

It is a super-2 number, since 2×649362587369² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 649362587299 and 649362587308.

It is not an unprimeable number, because it can be changed into a prime (649362587359) 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, 19098899612 + ... + 19098899645.

It is an arithmetic number, because the mean of its divisors is an integer number (171890096661).

Almost surely, 2^649362587369 is an apocalyptic number.

It is an amenable number.

649362587369 is a deficient number, since it is larger than the sum of its proper divisors (38197799275).

649362587369 is a wasteful number, since it uses less digits than its factorization.

649362587369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38197799274.

The product of its digits is 352719360, while the sum is 68.

The spelling of 649362587369 in words is "six hundred forty-nine billion, three hundred sixty-two million, five hundred eighty-seven thousand, three hundred sixty-nine".