1643676260144 has 40 divisors (see below), whose sum is σ = 3397693681008. Its totient is φ = 767590154240.

The previous prime is 1643676260143. The next prime is 1643676260173. The reversal of 1643676260144 is 4410626763461.

It is a junction number, because it is equal to n+sod(n) for n = 1643676260092 and 1643676260101.

It is not an unprimeable number, because it can be changed into a prime (1643676260143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23028977 + ... + 23100240.

Almost surely, 2^{1643676260144} is an apocalyptic number.

It is an amenable number.

1643676260144 is an abundant number, since it is smaller than the sum of its proper divisors (1754017420864).

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

1643676260144 is a wasteful number, since it uses less digits than its factorization.

1643676260144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46129373 (or 46129367 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 50.

The spelling of 1643676260144 in words is "one trillion, six hundred forty-three billion, six hundred seventy-six million, two hundred sixty thousand, one hundred forty-four".