1521663616001 has 8 divisors (see below), whose sum is σ = 1532643450240. Its totient is φ = 1510684247952.

The previous prime is 1521663615943. The next prime is 1521663616013. The reversal of 1521663616001 is 1006163661251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1521663616001 - 2⁶ = 1521663615937 is a prime.

It is a super-2 number, since 2×1521663616001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1521663615001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8991896 + ... + 9159558.

It is an arithmetic number, because the mean of its divisors is an integer number (191580431280).

Almost surely, 2^{1521663616001} is an apocalyptic number.

It is an amenable number.

1521663616001 is a deficient number, since it is larger than the sum of its proper divisors (10979834239).

1521663616001 is a wasteful number, since it uses less digits than its factorization.

1521663616001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233095.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 1521663616001 in words is "one trillion, five hundred twenty-one billion, six hundred sixty-three million, six hundred sixteen thousand, one".