816470055631 has 4 divisors (see below), whose sum is σ = 816647901664. Its totient is φ = 816292209600.

The previous prime is 816470055619. The next prime is 816470055641. The reversal of 816470055631 is 136550074618.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-816470055631 is a prime.

It is a super-2 number, since 2×816470055631² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816470055641) 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, 88916130 + ... + 88925311.

It is an arithmetic number, because the mean of its divisors is an integer number (204161975416).

Almost surely, 2^816470055631 is an apocalyptic number.

816470055631 is a deficient number, since it is larger than the sum of its proper divisors (177846033).

816470055631 is a wasteful number, since it uses less digits than its factorization.

816470055631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177846032.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 816470055631 in words is "eight hundred sixteen billion, four hundred seventy million, fifty-five thousand, six hundred thirty-one".