210742387650 has 36 divisors (see below), whose sum is σ = 566194549362. Its totient is φ = 56197969920.

The previous prime is 210742387621. The next prime is 210742387699. The reversal of 210742387650 is 56783247012.

210742387650 is a `hidden beast` number, since 2 + 107 + 423 + 8 + 76 + 50 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 129317194449 + 81425193201 = 359607^2 + 285351^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 210742387596 and 210742387605.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 234157759 + ... + 234158658.

Almost surely, 2^210742387650 is an apocalyptic number.

210742387650 is an abundant number, since it is smaller than the sum of its proper divisors (355452161712).

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

210742387650 is a wasteful number, since it uses less digits than its factorization.

210742387650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468316435 (or 468316427 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 210742387650 in words is "two hundred ten billion, seven hundred forty-two million, three hundred eighty-seven thousand, six hundred fifty".