2001512332656 has 120 divisors (see below), whose sum is σ = 5931725907744. Its totient is φ = 627843502080.

The previous prime is 2001512332649. The next prime is 2001512332661. The reversal of 2001512332656 is 6562332151002.

2001512332656 is a `hidden beast` number, since 200 + 1 + 5 + 123 + 326 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2001512332656.

It is a congruent number.

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, 20296140 + ... + 20394516.

Almost surely, 2^{2001512332656} is an apocalyptic number.

It is an amenable number.

2001512332656 is an abundant number, since it is smaller than the sum of its proper divisors (3930213575088).

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

2001512332656 is a wasteful number, since it uses less digits than its factorization.

2001512332656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106719 (or 106710 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 2001512332656 its reverse (6562332151002), we get a palindrome (8563844483658).

The spelling of 2001512332656 in words is "two trillion, one billion, five hundred twelve million, three hundred thirty-two thousand, six hundred fifty-six".