891630823425 has 24 divisors (see below), whose sum is σ = 1551750488160. Its totient is φ = 450508204800.

The previous prime is 891630823423. The next prime is 891630823477. The reversal of 891630823425 is 524328036198.

It is a happy number.

It is not a de Polignac number, because 891630823425 - 2¹ = 891630823423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (891630823423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 312851496 + ... + 312854345.

It is an arithmetic number, because the mean of its divisors is an integer number (64656270340).

Almost surely, 2^891630823425 is an apocalyptic number.

It is an amenable number.

891630823425 is a deficient number, since it is larger than the sum of its proper divisors (660119664735).

891630823425 is a wasteful number, since it uses less digits than its factorization.

891630823425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625705873 (or 625705868 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 51.

The spelling of 891630823425 in words is "eight hundred ninety-one billion, six hundred thirty million, eight hundred twenty-three thousand, four hundred twenty-five".