1017721609674 has 576 divisors, whose sum is σ = 2858054492160. Its totient is φ = 235976716800.

The previous prime is 1017721609637. The next prime is 1017721609741. The reversal of 1017721609674 is 4769061277101.

It is a super-2 number, since 2×1017721609674² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 3755430159 + ... + 3755430429.

It is an arithmetic number, because the mean of its divisors is an integer number (4961900160).

Almost surely, 2^{1017721609674} is an apocalyptic number.

1017721609674 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1017721609674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1429027246080).

1017721609674 is an abundant number, since it is smaller than the sum of its proper divisors (1840332882486).

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

1017721609674 is a wasteful number, since it uses less digits than its factorization.

1017721609674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 51.

The spelling of 1017721609674 in words is "one trillion, seventeen billion, seven hundred twenty-one million, six hundred nine thousand, six hundred seventy-four".