840055005501 has 4 divisors (see below), whose sum is σ = 1120073340672. Its totient is φ = 560036670332.

The previous prime is 840055005499. The next prime is 840055005523. The reversal of 840055005501 is 105500550048.

840055005501 is digitally balanced in base 2, because in such base 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 840055005501 - 2¹ = 840055005499 is a prime.

It is a super-2 number, since 2×840055005501² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840055005541) 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, 140009167581 + ... + 140009167586.

It is an arithmetic number, because the mean of its divisors is an integer number (280018335168).

Almost surely, 2^840055005501 is an apocalyptic number.

It is an amenable number.

840055005501 is a deficient number, since it is larger than the sum of its proper divisors (280018335171).

840055005501 is a wasteful number, since it uses less digits than its factorization.

840055005501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280018335170.

The product of its (nonzero) digits is 20000, while the sum is 33.

Adding to 840055005501 its reverse (105500550048), we get a palindrome (945555555549).

The spelling of 840055005501 in words is "eight hundred forty billion, fifty-five million, five thousand, five hundred one".