215698273371972 has 144 divisors (see below), whose sum is σ = 583711888032000. Its totient is φ = 66954990426048.

The previous prime is 215698273371943. The next prime is 215698273372003. The reversal of 215698273371972 is 279173372896512.

215698273371972 is a `hidden beast` number, since 2 + 1 + 56 + 98 + 273 + 37 + 197 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 215698273371972.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 481586443 + ... + 482034125.

It is an arithmetic number, because the mean of its divisors is an integer number (4053554778000).

Almost surely, 2^{215698273371972} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215698273371972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291855944016000).

215698273371972 is an abundant number, since it is smaller than the sum of its proper divisors (368013614660028).

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

215698273371972 is a wasteful number, since it uses less digits than its factorization.

215698273371972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459710 (or 459705 counting only the distinct ones).

The product of its digits is 480090240, while the sum is 72.

The spelling of 215698273371972 in words is "two hundred fifteen trillion, six hundred ninety-eight billion, two hundred seventy-three million, three hundred seventy-one thousand, nine hundred seventy-two".