649127859559776 has 336 divisors, whose sum is σ = 2015206957491840. Its totient is φ = 205445202094080.

The previous prime is 649127859559763. The next prime is 649127859559801. The reversal of 649127859559776 is 677955958721946.

It is a happy number.

649127859559776 is a `hidden beast` number, since 6 + 4 + 9 + 1 + 2 + 7 + 8 + 5 + 9 + 5 + 597 + 7 + 6 = 666.

It is a super-2 number, since 2×649127859559776² (a number of 30 digits) 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 55 ways as a sum of consecutive naturals, for example, 29859820 + ... + 46795988.

It is an arithmetic number, because the mean of its divisors is an integer number (5997639754440).

Almost surely, 2^{649127859559776} 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 649127859559776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1007603478745920).

649127859559776 is an abundant number, since it is smaller than the sum of its proper divisors (1366079097932064).

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

649127859559776 is a wasteful number, since it uses less digits than its factorization.

649127859559776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16936281 (or 16936258 counting only the distinct ones).

The product of its digits is 72013536000, while the sum is 90.

The spelling of 649127859559776 in words is "six hundred forty-nine trillion, one hundred twenty-seven billion, eight hundred fifty-nine million, five hundred fifty-nine thousand, seven hundred seventy-six".