649547745946 has 64 divisors (see below), whose sum is σ = 1130733665280. Its totient is φ = 276572482560.

The previous prime is 649547745943. The next prime is 649547745953.

It is a happy number.

649547745946 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (649547745943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71116396 + ... + 71125528.

It is an arithmetic number, because the mean of its divisors is an integer number (17667713520).

Almost surely, 2^649547745946 is an apocalyptic number.

649547745946 is a deficient number, since it is larger than the sum of its proper divisors (481185919334).

649547745946 is a wasteful number, since it uses less digits than its factorization.

649547745946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10039.

The product of its digits is 914457600, while the sum is 70.

The spelling of 649547745946 in words is "six hundred forty-nine billion, five hundred forty-seven million, seven hundred forty-five thousand, nine hundred forty-six".