840281047461 has 12 divisors (see below), whose sum is σ = 1214667952992. Its totient is φ = 559758751656.

The previous prime is 840281047439. The next prime is 840281047477. The reversal of 840281047461 is 164740182048.

840281047461 is a `hidden beast` number, since 8 + 40 + 2 + 81 + 0 + 474 + 61 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-840281047461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840281047061) 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, 35705361 + ... + 35728886.

It is an arithmetic number, because the mean of its divisors is an integer number (101222329416).

Almost surely, 2^840281047461 is an apocalyptic number.

It is an amenable number.

840281047461 is a deficient number, since it is larger than the sum of its proper divisors (374386905531).

840281047461 is a wasteful number, since it uses less digits than its factorization.

840281047461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71435560 (or 71435557 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The spelling of 840281047461 in words is "eight hundred forty billion, two hundred eighty-one million, forty-seven thousand, four hundred sixty-one".