64650412256490 has 24 divisors (see below), whose sum is σ = 168091071867108. Its totient is φ = 17240109935040.

The previous prime is 64650412256401. The next prime is 64650412256491. The reversal of 64650412256490 is 9465221405646.

64650412256490 is a `hidden beast` number, since 6 + 4 + 6 + 50 + 4 + 1 + 22 + 564 + 9 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 63211038588369 + 1439373668121 = 7950537^2 + 1199739^2 .

It is a super-2 number, since 2×64650412256490² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64650412256491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 359168956891 + ... + 359168957070.

Almost surely, 2^{64650412256490} is an apocalyptic number.

64650412256490 is an abundant number, since it is smaller than the sum of its proper divisors (103440659610618).

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

64650412256490 is a wasteful number, since it uses less digits than its factorization.

64650412256490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718337913974 (or 718337913971 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 54.

The spelling of 64650412256490 in words is "sixty-four trillion, six hundred fifty billion, four hundred twelve million, two hundred fifty-six thousand, four hundred ninety".