85511421401 has 24 divisors (see below), whose sum is σ = 106211312064. Its totient is φ = 68478268320.

The previous prime is 85511421397. The next prime is 85511421403. The reversal of 85511421401 is 10412411558.

It is not a de Polignac number, because 85511421401 - 2² = 85511421397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85511421403) 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, 833810 + ... + 930731.

It is an arithmetic number, because the mean of its divisors is an integer number (4425471336).

Almost surely, 2^85511421401 is an apocalyptic number.

It is an amenable number.

85511421401 is a deficient number, since it is larger than the sum of its proper divisors (20699890663).

85511421401 is a wasteful number, since it uses less digits than its factorization.

85511421401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764621 (or 1764614 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 32.

Adding to 85511421401 its reverse (10412411558), we get a palindrome (95923832959).

The spelling of 85511421401 in words is "eighty-five billion, five hundred eleven million, four hundred twenty-one thousand, four hundred one".