921406071601 has 32 divisors (see below), whose sum is σ = 994701254400. Its totient is φ = 850406430720.

The previous prime is 921406071589. The next prime is 921406071631. The reversal of 921406071601 is 106170604129.

It is a cyclic number.

It is not a de Polignac number, because 921406071601 - 2³¹ = 919258587953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921406071631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 288749916 + ... + 288753106.

It is an arithmetic number, because the mean of its divisors is an integer number (31084414200).

Almost surely, 2^921406071601 is an apocalyptic number.

It is an amenable number.

921406071601 is a deficient number, since it is larger than the sum of its proper divisors (73295182799).

921406071601 is a wasteful number, since it uses less digits than its factorization.

921406071601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4809.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 921406071601 in words is "nine hundred twenty-one billion, four hundred six million, seventy-one thousand, six hundred one".