1521543350412 has 18 divisors (see below), whose sum is σ = 3846123469188. Its totient is φ = 507181116792.

The previous prime is 1521543350401. The next prime is 1521543350413. The reversal of 1521543350412 is 2140533451251.

1521543350412 is a `hidden beast` number, since 1 + 5 + 21 + 543 + 3 + 50 + 41 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 42265093067 = 1521543350412 / (1 + 5 + 2 + 1 + 5 + 4 + 3 + 3 + 5 + 0 + 4 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (1521543350413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21132546498 + ... + 21132546569.

It is an arithmetic number, because the mean of its divisors is an integer number (213673526066).

Almost surely, 2^{1521543350412} is an apocalyptic number.

1521543350412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1521543350412 is an abundant number, since it is smaller than the sum of its proper divisors (2324580118776).

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

1521543350412 is a wasteful number, since it uses less digits than its factorization.

1521543350412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42265093077 (or 42265093072 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 1521543350412 in words is "one trillion, five hundred twenty-one billion, five hundred forty-three million, three hundred fifty thousand, four hundred twelve".