921742701712 has 80 divisors (see below), whose sum is σ = 2097834618880. Its totient is φ = 384115084416.

The previous prime is 921742701689. The next prime is 921742701713. The reversal of 921742701712 is 217107247129.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (921742701713) 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, 644839 + ... + 1503097.

It is an arithmetic number, because the mean of its divisors is an integer number (26222932736).

Almost surely, 2^921742701712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 921742701712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1048917309440).

921742701712 is an abundant number, since it is smaller than the sum of its proper divisors (1176091917168).

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

921742701712 is a wasteful number, since it uses less digits than its factorization.

921742701712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858540 (or 858534 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 43.

The spelling of 921742701712 in words is "nine hundred twenty-one billion, seven hundred forty-two million, seven hundred one thousand, seven hundred twelve".