495273818520 has 512 divisors, whose sum is σ = 1894112640000. Its totient is φ = 114100420608.

The previous prime is 495273818519. The next prime is 495273818591. The reversal of 495273818520 is 25818372594.

495273818520 is a `hidden beast` number, since 4 + 9 + 527 + 38 + 1 + 85 + 2 + 0 = 666.

It is a super-2 number, since 2×495273818520² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 22129896 + ... + 22152264.

It is an arithmetic number, because the mean of its divisors is an integer number (3699438750).

Almost surely, 2^495273818520 is an apocalyptic number.

495273818520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 495273818520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (947056320000).

495273818520 is an abundant number, since it is smaller than the sum of its proper divisors (1398838821480).

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

495273818520 is a wasteful number, since it uses less digits than its factorization.

495273818520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22504 (or 22494 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 495273818520 in words is "four hundred ninety-five billion, two hundred seventy-three million, eight hundred eighteen thousand, five hundred twenty".