649425576164 has 6 divisors (see below), whose sum is σ = 1136494758294. Its totient is φ = 324712788080.

The previous prime is 649425576161. The next prime is 649425576193. The reversal of 649425576164 is 461675524946.

649425576164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 495728646400 + 153696929764 = 704080^2 + 392042^2 .

It is not an unprimeable number, because it can be changed into a prime (649425576161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81178197017 + ... + 81178197024.

It is an arithmetic number, because the mean of its divisors is an integer number (189415793049).

Almost surely, 2^649425576164 is an apocalyptic number.

It is an amenable number.

649425576164 is a deficient number, since it is larger than the sum of its proper divisors (487069182130).

649425576164 is a wasteful number, since it uses less digits than its factorization.

649425576164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162356394045 (or 162356394043 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 59.

The spelling of 649425576164 in words is "six hundred forty-nine billion, four hundred twenty-five million, five hundred seventy-six thousand, one hundred sixty-four".