1917056428980 has 384 divisors, whose sum is σ = 6771391893504. Its totient is φ = 393652224000.

The previous prime is 1917056428951. The next prime is 1917056428999. The reversal of 1917056428980 is 898246507191.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 339239155 + ... + 339244805.

It is an arithmetic number, because the mean of its divisors is an integer number (17633833056).

Almost surely, 2^{1917056428980} is an apocalyptic number.

1917056428980 is a gapful number since it is divisible by the number (10) 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 1917056428980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3385695946752).

1917056428980 is an abundant number, since it is smaller than the sum of its proper divisors (4854335464524).

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

1917056428980 is a wasteful number, since it uses less digits than its factorization.

1917056428980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6535 (or 6533 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 60.

The spelling of 1917056428980 in words is "one trillion, nine hundred seventeen billion, fifty-six million, four hundred twenty-eight thousand, nine hundred eighty".