649529496 has 256 divisors, whose sum is σ = 2298240000. Its totient is φ = 168497280.

The previous prime is 649529479. The next prime is 649529509. The reversal of 649529496 is 694925946.

It is a happy number.

649529496 is a `hidden beast` number, since 64 + 95 + 2 + 9 + 496 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 814570 + ... + 815366.

It is an arithmetic number, because the mean of its divisors is an integer number (8977500).

Almost surely, 2^649529496 is an apocalyptic number.

649529496 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649529496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1149120000).

649529496 is an abundant number, since it is smaller than the sum of its proper divisors (1648710504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649529496 is a wasteful number, since it uses less digits than its factorization.

649529496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844 (or 820 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The square root of 649529496 is about 25485.8685549463. The cubic root of 649529496 is about 866.0300451648.

The spelling of 649529496 in words is "six hundred forty-nine million, five hundred twenty-nine thousand, four hundred ninety-six".