891026055 has 32 divisors (see below), whose sum is σ = 1589280000. Its totient is φ = 473643936.

The previous prime is 891026053. The next prime is 891026057. The reversal of 891026055 is 550620198.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (891026053) and next prime (891026057).

It is not a de Polignac number, because 891026055 - 2¹ = 891026053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891026053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30696 + ... + 52194.

It is an arithmetic number, because the mean of its divisors is an integer number (49665000).

Almost surely, 2^891026055 is an apocalyptic number.

891026055 is a deficient number, since it is larger than the sum of its proper divisors (698253945).

891026055 is a wasteful number, since it uses less digits than its factorization.

891026055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21820 (or 21814 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 891026055 is about 29850.0595476793. The cubic root of 891026055 is about 962.2696785153.

The spelling of 891026055 in words is "eight hundred ninety-one million, twenty-six thousand, fifty-five".