1521663616042 has 16 divisors (see below), whose sum is σ = 2382029233920. Its totient is φ = 727662062512.

The previous prime is 1521663616027. The next prime is 1521663616087. The reversal of 1521663616042 is 2406163661251.

It is a self number, because there is not a number n which added to its sum of digits gives 1521663616042.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1671442 + ... + 2415997.

It is an arithmetic number, because the mean of its divisors is an integer number (148876827120).

Almost surely, 2^{1521663616042} is an apocalyptic number.

1521663616042 is a deficient number, since it is larger than the sum of its proper divisors (860365617878).

1521663616042 is a wasteful number, since it uses less digits than its factorization.

1521663616042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4095557.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 1521663616042 in words is "one trillion, five hundred twenty-one billion, six hundred sixty-three million, six hundred sixteen thousand, forty-two".