649746364450 has 24 divisors (see below), whose sum is σ = 1250201628180. Its totient is φ = 250936526400.

The previous prime is 649746364447. The next prime is 649746364469. The reversal of 649746364450 is 54463647946.

649746364450 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 6 ways, for example, as 212107223601 + 437639140849 = 460551^2 + 661543^2 .

It is a Harshad number since it is a multiple of its sum of digits (58).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224049021 + ... + 224051920.

Almost surely, 2^649746364450 is an apocalyptic number.

649746364450 is a deficient number, since it is larger than the sum of its proper divisors (600455263730).

649746364450 is a wasteful number, since it uses less digits than its factorization.

649746364450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448100982 (or 448100977 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 58.

The spelling of 649746364450 in words is "six hundred forty-nine billion, seven hundred forty-six million, three hundred sixty-four thousand, four hundred fifty".