1630460721636 has 72 divisors (see below), whose sum is σ = 4183938577728. Its totient is φ = 535261944000.

The previous prime is 1630460721577. The next prime is 1630460721641. The reversal of 1630460721636 is 6361270640361.

1630460721636 is a `hidden beast` number, since 1 + 6 + 3 + 0 + 4 + 6 + 0 + 7 + 2 + 1 + 636 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1630460721591 and 1630460721600.

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, 2066251 + ... + 2744141.

It is an arithmetic number, because the mean of its divisors is an integer number (58110258024).

Almost surely, 2^{1630460721636} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1630460721636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2091969288864).

1630460721636 is an abundant number, since it is smaller than the sum of its proper divisors (2553477856092).

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

1630460721636 is a wasteful number, since it uses less digits than its factorization.

1630460721636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678913 (or 678908 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The spelling of 1630460721636 in words is "one trillion, six hundred thirty billion, four hundred sixty million, seven hundred twenty-one thousand, six hundred thirty-six".