891442144401 has 4 divisors (see below), whose sum is σ = 1188589525872. Its totient is φ = 594294762932.

The previous prime is 891442144399. The next prime is 891442144469. The reversal of 891442144401 is 104441244198.

891442144401 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 891442144401 - 2¹ = 891442144399 is a prime.

It is a super-3 number, since 3×891442144401³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (891442140401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148573690731 + ... + 148573690736.

It is an arithmetic number, because the mean of its divisors is an integer number (297147381468).

Almost surely, 2^891442144401 is an apocalyptic number.

It is an amenable number.

891442144401 is a deficient number, since it is larger than the sum of its proper divisors (297147381471).

891442144401 is a wasteful number, since it uses less digits than its factorization.

891442144401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297147381470.

The product of its (nonzero) digits is 147456, while the sum is 42.

Adding to 891442144401 its reverse (104441244198), we get a palindrome (995883388599).

The spelling of 891442144401 in words is "eight hundred ninety-one billion, four hundred forty-two million, one hundred forty-four thousand, four hundred one".