9781404743892 has 24 divisors (see below), whose sum is σ = 23379943047552. Its totient is φ = 3180944632000.

The previous prime is 9781404743833. The next prime is 9781404743899. The reversal of 9781404743892 is 2983474041879.

9781404743892 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×9781404743892² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9781404743899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9940451484 + ... + 9940452467.

It is an arithmetic number, because the mean of its divisors is an integer number (974164293648).

Almost surely, 2^{9781404743892} is an apocalyptic number.

It is an amenable number.

9781404743892 is an abundant number, since it is smaller than the sum of its proper divisors (13598538303660).

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

9781404743892 is a wasteful number, since it uses less digits than its factorization.

9781404743892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19880903999 (or 19880903997 counting only the distinct ones).

The product of its (nonzero) digits is 97542144, while the sum is 66.

The spelling of 9781404743892 in words is "nine trillion, seven hundred eighty-one billion, four hundred four million, seven hundred forty-three thousand, eight hundred ninety-two".