508856666454 has 128 divisors (see below), whose sum is σ = 1156497408000. Its totient is φ = 165812119200.

The previous prime is 508856666407. The next prime is 508856666471. The reversal of 508856666454 is 454666658805.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 508856666391 and 508856666400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 345924939 + ... + 345926409.

It is an arithmetic number, because the mean of its divisors is an integer number (9035136000).

Almost surely, 2^508856666454 is an apocalyptic number.

508856666454 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 508856666454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (578248704000).

508856666454 is an abundant number, since it is smaller than the sum of its proper divisors (647640741546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

508856666454 is a wasteful number, since it uses less digits than its factorization.

508856666454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311 (or 2305 counting only the distinct ones).

The product of its (nonzero) digits is 165888000, while the sum is 63.

The spelling of 508856666454 in words is "five hundred eight billion, eight hundred fifty-six million, six hundred sixty-six thousand, four hundred fifty-four".