649054813057 has 12 divisors (see below), whose sum is σ = 767400374676. Its totient is φ = 547212486240.

The previous prime is 649054813009. The next prime is 649054813061. The reversal of 649054813057 is 750318450946.

It can be written as a sum of positive squares in 2 ways, for example, as 97368337521 + 551686475536 = 312039^2 + 742756^2 .

It is a de Polignac number, because none of the positive numbers 2^k-649054813057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 649054812995 and 649054813013.

It is not an unprimeable number, because it can be changed into a prime (649054813007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108570918 + ... + 108576895.

It is an arithmetic number, because the mean of its divisors is an integer number (63950031223).

Almost surely, 2^649054813057 is an apocalyptic number.

It is an amenable number.

649054813057 is a deficient number, since it is larger than the sum of its proper divisors (118345561619).

649054813057 is a wasteful number, since it uses less digits than its factorization.

649054813057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217147888 (or 217147881 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 649054813057 in words is "six hundred forty-nine billion, fifty-four million, eight hundred thirteen thousand, fifty-seven".