649691425152 has 1280 divisors, whose sum is σ = 2575872161280. Its totient is φ = 158018273280.

The previous prime is 649691425147. The next prime is 649691425177. The reversal of 649691425152 is 251524196946.

It is a happy number.

649691425152 is a `hidden beast` number, since 6 + 4 + 9 + 69 + 1 + 425 + 152 = 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 polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 3297925918 + ... + 3297926114.

It is an arithmetic number, because the mean of its divisors is an integer number (2012400126).

Almost surely, 2^649691425152 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 649691425152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1287936080640).

649691425152 is an abundant number, since it is smaller than the sum of its proper divisors (1926180736128).

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

649691425152 is an equidigital number, since it uses as much as digits as its factorization.

649691425152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 237 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The spelling of 649691425152 in words is "six hundred forty-nine billion, six hundred ninety-one million, four hundred twenty-five thousand, one hundred fifty-two".