1643616020260 has 24 divisors (see below), whose sum is σ = 3454206562296. Its totient is φ = 656948709120.

The previous prime is 1643616020257. The next prime is 1643616020279. The reversal of 1643616020260 is 620206163461.

It can be written as a sum of positive squares in 4 ways, for example, as 282394462464 + 1361221557796 = 531408^2 + 1166714^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31079107 + ... + 31131946.

It is an arithmetic number, because the mean of its divisors is an integer number (143925273429).

Almost surely, 2^{1643616020260} is an apocalyptic number.

1643616020260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1643616020260 is an abundant number, since it is smaller than the sum of its proper divisors (1810590542036).

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

1643616020260 is a wasteful number, since it uses less digits than its factorization.

1643616020260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62212383 (or 62212381 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 1643616020260 in words is "one trillion, six hundred forty-three billion, six hundred sixteen million, twenty thousand, two hundred sixty".