855191401 has 16 divisors (see below), whose sum is σ = 876712896. Its totient is φ = 834052096.

The previous prime is 855191347. The next prime is 855191429. The reversal of 855191401 is 104191558.

It is a cyclic number.

It is not a de Polignac number, because 855191401 - 2¹⁷ = 855060329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855191431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3327465 + ... + 3327721.

It is an arithmetic number, because the mean of its divisors is an integer number (54794556).

Almost surely, 2^855191401 is an apocalyptic number.

It is an amenable number.

855191401 is a deficient number, since it is larger than the sum of its proper divisors (21521495).

855191401 is a wasteful number, since it uses less digits than its factorization.

855191401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728.

The product of its (nonzero) digits is 7200, while the sum is 34.

The square root of 855191401 is about 29243.6557393223. The cubic root of 855191401 is about 949.1928142610.

The spelling of 855191401 in words is "eight hundred fifty-five million, one hundred ninety-one thousand, four hundred one".