919894472428601 has 32 divisors (see below), whose sum is σ = 944637410062080. Its totient is φ = 895543611088896.

The previous prime is 919894472428579. The next prime is 919894472428639. The reversal of 919894472428601 is 106824274498919.

It is a cyclic number.

It is not a de Polignac number, because 919894472428601 - 2¹⁸ = 919894472166457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (919894472425601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3690421565 + ... + 3690670821.

It is an arithmetic number, because the mean of its divisors is an integer number (29519919064440).

Almost surely, 2^{919894472428601} is an apocalyptic number.

It is an amenable number.

919894472428601 is a deficient number, since it is larger than the sum of its proper divisors (24742937633479).

919894472428601 is a wasteful number, since it uses less digits than its factorization.

919894472428601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251393.

The product of its (nonzero) digits is 501645312, while the sum is 74.

The spelling of 919894472428601 in words is "nine hundred nineteen trillion, eight hundred ninety-four billion, four hundred seventy-two million, four hundred twenty-eight thousand, six hundred one".