649621076 has 12 divisors (see below), whose sum is σ = 1224285972. Its totient is φ = 299825088.

The previous prime is 649621073. The next prime is 649621117. The reversal of 649621076 is 670126946.

649621076 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 2 ways, for example, as 426835600 + 222785476 = 20660^2 + 14926^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649621073) 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, 6246305 + ... + 6246408.

It is an arithmetic number, because the mean of its divisors is an integer number (102023831).

Almost surely, 2^649621076 is an apocalyptic number.

It is an amenable number.

649621076 is a deficient number, since it is larger than the sum of its proper divisors (574664896).

649621076 is a wasteful number, since it uses less digits than its factorization.

649621076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12492730 (or 12492728 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 649621076 is about 25487.6651735697. The cubic root of 649621076 is about 866.0707450379.

It can be divided in two parts, 6496 and 21076, that added together give a palindrome (27572).

The spelling of 649621076 in words is "six hundred forty-nine million, six hundred twenty-one thousand, seventy-six".