1980906638508 has 216 divisors, whose sum is σ = 6222897844800. Its totient is φ = 528181891776.

The previous prime is 1980906638479. The next prime is 1980906638549. The reversal of 1980906638508 is 8058366090891.

1980906638508 is a `hidden beast` number, since 1 + 9 + 8 + 0 + 90 + 6 + 6 + 38 + 508 = 666.

It is a super-2 number, since 2×1980906638508² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1804503 + ... + 2686641.

Almost surely, 2^{1980906638508} is an apocalyptic number.

1980906638508 is a gapful number since it is divisible by the number (18) 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 1980906638508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3111448922400).

1980906638508 is an abundant number, since it is smaller than the sum of its proper divisors (4241991206292).

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

1980906638508 is a wasteful number, since it uses less digits than its factorization.

1980906638508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882249 (or 882237 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 63.

The spelling of 1980906638508 in words is "one trillion, nine hundred eighty billion, nine hundred six million, six hundred thirty-eight thousand, five hundred eight".