1644606415052 has 12 divisors (see below), whose sum is σ = 2878070723136. Its totient is φ = 822300494160.

The previous prime is 1644606415037. The next prime is 1644606415057. The reversal of 1644606415052 is 2505146064461.

It is a junction number, because it is equal to n+sod(n) for n = 1644606414994 and 1644606415012.

It is not an unprimeable number, because it can be changed into a prime (1644606415057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1378118 + ... + 2277810.

It is an arithmetic number, because the mean of its divisors is an integer number (239839226928).

Almost surely, 2^{1644606415052} is an apocalyptic number.

It is an amenable number.

1644606415052 is a deficient number, since it is larger than the sum of its proper divisors (1233464308084).

1644606415052 is a wasteful number, since it uses less digits than its factorization.

1644606415052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356688 (or 1356686 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 1644606415052 in words is "one trillion, six hundred forty-four billion, six hundred six million, four hundred fifteen thousand, fifty-two".