785361917421 has 48 divisors (see below), whose sum is σ = 1256827353600. Its totient is φ = 488614606128.

The previous prime is 785361917411. The next prime is 785361917449. The reversal of 785361917421 is 124719163587.

785361917421 is a `hidden beast` number, since 7 + 8 + 5 + 3 + 619 + 17 + 4 + 2 + 1 = 666.

It is not a de Polignac number, because 785361917421 - 2⁶ = 785361917357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (785361917411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 960081 + ... + 1578758.

It is an arithmetic number, because the mean of its divisors is an integer number (26183903200).

Almost surely, 2^785361917421 is an apocalyptic number.

It is an amenable number.

785361917421 is a deficient number, since it is larger than the sum of its proper divisors (471465436179).

785361917421 is a wasteful number, since it uses less digits than its factorization.

785361917421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2538940 (or 2538928 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The spelling of 785361917421 in words is "seven hundred eighty-five billion, three hundred sixty-one million, nine hundred seventeen thousand, four hundred twenty-one".