649019015789 has 4 divisors (see below), whose sum is σ = 651878130624. Its totient is φ = 646159900956.

The previous prime is 649019015767. The next prime is 649019015803. The reversal of 649019015789 is 987510910946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649019015789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649019017789) 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, 1429557077 + ... + 1429557530.

It is an arithmetic number, because the mean of its divisors is an integer number (162969532656).

Almost surely, 2^649019015789 is an apocalyptic number.

It is an amenable number.

649019015789 is a deficient number, since it is larger than the sum of its proper divisors (2859114835).

649019015789 is a wasteful number, since it uses less digits than its factorization.

649019015789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2859114834.

The product of its (nonzero) digits is 4898880, while the sum is 59.

The spelling of 649019015789 in words is "six hundred forty-nine billion, nineteen million, fifteen thousand, seven hundred eighty-nine".