920894756691 has 64 divisors (see below), whose sum is σ = 1612541127680. Its totient is φ = 453877032960.

The previous prime is 920894756689. The next prime is 920894756693. The reversal of 920894756691 is 196657498029.

It is an interprime number because it is at equal distance from previous prime (920894756689) and next prime (920894756693).

It is not a de Polignac number, because 920894756691 - 2¹ = 920894756689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (920894756693) 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 63 ways as a sum of consecutive naturals, for example, 837370 + ... + 1594671.

It is an arithmetic number, because the mean of its divisors is an integer number (25195955120).

Almost surely, 2^920894756691 is an apocalyptic number.

920894756691 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

920894756691 is a deficient number, since it is larger than the sum of its proper divisors (691646370989).

920894756691 is a wasteful number, since it uses less digits than its factorization.

920894756691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432156.

The product of its (nonzero) digits is 58786560, while the sum is 66.

The spelling of 920894756691 in words is "nine hundred twenty billion, eight hundred ninety-four million, seven hundred fifty-six thousand, six hundred ninety-one".