920667128557 has 16 divisors (see below), whose sum is σ = 1006979424192. Its totient is φ = 834791857920.

The previous prime is 920667128551. The next prime is 920667128663. The reversal of 920667128557 is 755821766029.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-920667128557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920667128551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17296458 + ... + 17349604.

It is an arithmetic number, because the mean of its divisors is an integer number (62936214012).

Almost surely, 2^920667128557 is an apocalyptic number.

It is an amenable number.

920667128557 is a deficient number, since it is larger than the sum of its proper divisors (86312295635).

920667128557 is a wasteful number, since it uses less digits than its factorization.

920667128557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57228.

The product of its (nonzero) digits is 12700800, while the sum is 58.

The spelling of 920667128557 in words is "nine hundred twenty billion, six hundred sixty-seven million, one hundred twenty-eight thousand, five hundred fifty-seven".