1520644001012 has 12 divisors (see below), whose sum is σ = 2661140281380. Its totient is φ = 760318206336.

The previous prime is 1520644001003. The next prime is 1520644001017. The reversal of 1520644001012 is 2101004460251.

It can be written as a sum of positive squares in 2 ways, for example, as 881037540496 + 639606460516 = 938636^2 + 799754^2 .

It is a super-3 number, since 3×1520644001012³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520644001017) 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, 76238 + ... + 1745594.

It is an arithmetic number, because the mean of its divisors is an integer number (221761690115).

Almost surely, 2^{1520644001012} is an apocalyptic number.

It is an amenable number.

1520644001012 is a deficient number, since it is larger than the sum of its proper divisors (1140496280368).

1520644001012 is a wasteful number, since it uses less digits than its factorization.

1520644001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897090 (or 1897088 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 1520644001012 its reverse (2101004460251), we get a palindrome (3621648461263).

The spelling of 1520644001012 in words is "one trillion, five hundred twenty billion, six hundred forty-four million, one thousand, twelve".