9721426545000 has 640 divisors, whose sum is σ = 35119133280000. Its totient is φ = 2487832704000.

The previous prime is 9721426544989. The next prime is 9721426545011. The reversal of 9721426545000 is 5456241279.

9721426545000 is a `hidden beast` number, since 9 + 72 + 1 + 4 + 26 + 54 + 500 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (9721426544989) and next prime (9721426545011).

It is a super-2 number, since 2×9721426545000² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 653797566 + ... + 653812434.

It is an arithmetic number, because the mean of its divisors is an integer number (54873645750).

Almost surely, 2^{9721426545000} is an apocalyptic number.

9721426545000 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9721426545000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17559566640000).

9721426545000 is an abundant number, since it is smaller than the sum of its proper divisors (25397706735000).

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

9721426545000 is a wasteful number, since it uses less digits than its factorization.

9721426545000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15100 (or 15075 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 9721426545000 in words is "nine trillion, seven hundred twenty-one billion, four hundred twenty-six million, five hundred forty-five thousand".