855391834501 has 4 divisors (see below), whose sum is σ = 855399959404. Its totient is φ = 855383709600.

The previous prime is 855391834487. The next prime is 855391834519. The reversal of 855391834501 is 105438193558.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105438193558 = 2 ⋅52719096779.

It can be written as a sum of positive squares in 2 ways, for example, as 37325853601 + 818065980900 = 193199^2 + 904470^2 .

It is a cyclic number.

It is not a de Polignac number, because 855391834501 - 2³¹ = 853244350853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855391834571) 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, 3902430 + ... + 4115791.

It is an arithmetic number, because the mean of its divisors is an integer number (213849989851).

Almost surely, 2^855391834501 is an apocalyptic number.

It is an amenable number.

855391834501 is a deficient number, since it is larger than the sum of its proper divisors (8124903).

855391834501 is a wasteful number, since it uses less digits than its factorization.

855391834501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8124902.

The product of its (nonzero) digits is 2592000, while the sum is 52.

The spelling of 855391834501 in words is "eight hundred fifty-five billion, three hundred ninety-one million, eight hundred thirty-four thousand, five hundred one".