216761476825 has 12 divisors (see below), whose sum is σ = 268851534588. Its totient is φ = 173365760000.

The previous prime is 216761476823. The next prime is 216761476829. The reversal of 216761476825 is 528674167612.

It can be written as a sum of positive squares in 6 ways, for example, as 600642064 + 216160834761 = 24508^2 + 464931^2 .

It is not a de Polignac number, because 216761476825 - 2¹ = 216761476823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216761476823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 983512 + ... + 1183561.

It is an arithmetic number, because the mean of its divisors is an integer number (22404294549).

Almost surely, 2^216761476825 is an apocalyptic number.

216761476825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216761476825 is a deficient number, since it is larger than the sum of its proper divisors (52090057763).

216761476825 is a wasteful number, since it uses less digits than its factorization.

216761476825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171084 (or 2171079 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 55.

The spelling of 216761476825 in words is "two hundred sixteen billion, seven hundred sixty-one million, four hundred seventy-six thousand, eight hundred twenty-five".