212746270545 has 24 divisors (see below), whose sum is σ = 368795247912. Its totient is φ = 113453894400.

The previous prime is 212746270543. The next prime is 212746270553. The reversal of 212746270545 is 545072647212.

212746270545 is a `hidden beast` number, since 2 + 12 + 7 + 4 + 627 + 0 + 5 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 57042634896 + 155703635649 = 238836^2 + 394593^2 .

It is not a de Polignac number, because 212746270545 - 2¹ = 212746270543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 212746270545.

It is not an unprimeable number, because it can be changed into a prime (212746270543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 265885 + ... + 704405.

It is an arithmetic number, because the mean of its divisors is an integer number (15366468663).

Almost surely, 2^212746270545 is an apocalyptic number.

It is an amenable number.

212746270545 is a deficient number, since it is larger than the sum of its proper divisors (156048977367).

212746270545 is a wasteful number, since it uses less digits than its factorization.

212746270545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449313 (or 449310 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 45.

The spelling of 212746270545 in words is "two hundred twelve billion, seven hundred forty-six million, two hundred seventy thousand, five hundred forty-five".