840749913507 has 16 divisors (see below), whose sum is σ = 1281322109952. Its totient is φ = 480361252800.

The previous prime is 840749913401. The next prime is 840749913547. The reversal of 840749913507 is 705319947048.

It is a happy number.

It is not a de Polignac number, because 840749913507 - 2¹¹ = 840749911459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840749913547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2649138 + ... + 2949479.

It is an arithmetic number, because the mean of its divisors is an integer number (80082631872).

Almost surely, 2^840749913507 is an apocalyptic number.

840749913507 is a deficient number, since it is larger than the sum of its proper divisors (440572196445).

840749913507 is a wasteful number, since it uses less digits than its factorization.

840749913507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5605778.

The product of its (nonzero) digits is 7620480, while the sum is 57.

The spelling of 840749913507 in words is "eight hundred forty billion, seven hundred forty-nine million, nine hundred thirteen thousand, five hundred seven".