649615356 has 144 divisors (see below), whose sum is σ = 1927910880. Its totient is φ = 188006400.

The previous prime is 649615333. The next prime is 649615367. The reversal of 649615356 is 653516946.

649615356 is a `hidden beast` number, since 6 + 496 + 153 + 5 + 6 = 666.

It is a super-2 number, since 2×649615356² = 844000221502013472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 404956 + ... + 406556.

It is an arithmetic number, because the mean of its divisors is an integer number (13388270).

Almost surely, 2^649615356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649615356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (963955440).

649615356 is an abundant number, since it is smaller than the sum of its proper divisors (1278295524).

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

649615356 is a wasteful number, since it uses less digits than its factorization.

649615356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661 (or 1636 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The square root of 649615356 is about 25487.5529621814. The cubic root of 649615356 is about 866.0682030744.

The spelling of 649615356 in words is "six hundred forty-nine million, six hundred fifteen thousand, three hundred fifty-six".