12810581628 has 48 divisors (see below), whose sum is σ = 32359305216. Its totient is φ = 3921071040.

The previous prime is 12810581573. The next prime is 12810581633. The reversal of 12810581628 is 82618501821.

It is a super-2 number, since 2×12810581628² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12810581628.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185176 + ... + 244767.

It is an arithmetic number, because the mean of its divisors is an integer number (674152192).

Almost surely, 2^12810581628 is an apocalyptic number.

It is an amenable number.

12810581628 is an abundant number, since it is smaller than the sum of its proper divisors (19548723588).

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

12810581628 is a wasteful number, since it uses less digits than its factorization.

12810581628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430154 (or 430152 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 42.

The spelling of 12810581628 in words is "twelve billion, eight hundred ten million, five hundred eighty-one thousand, six hundred twenty-eight".