1630720664352 has 144 divisors (see below), whose sum is σ = 5043529560888. Its totient is φ = 496792166400.

The previous prime is 1630720664323. The next prime is 1630720664411. The reversal of 1630720664352 is 2534660270361.

1630720664352 is a `hidden beast` number, since 1 + 6 + 3 + 0 + 7 + 206 + 6 + 435 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1486536423696 + 144184240656 = 1219236^2 + 379716^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 1630720664298 and 1630720664307.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1778073 + ... + 2534360.

Almost surely, 2^{1630720664352} is an apocalyptic number.

1630720664352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1630720664352 is an abundant number, since it is smaller than the sum of its proper divisors (3412808896536).

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

1630720664352 is a wasteful number, since it uses less digits than its factorization.

1630720664352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4312563 (or 4312552 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 45.

The spelling of 1630720664352 in words is "one trillion, six hundred thirty billion, seven hundred twenty million, six hundred sixty-four thousand, three hundred fifty-two".