11980017972 has 72 divisors (see below), whose sum is σ = 33736870440. Its totient is φ = 3559046400.

The previous prime is 11980017971. The next prime is 11980018003. The reversal of 11980017972 is 27971008911.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 890664336 + 11089353636 = 29844^2 + 105306^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11980017971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 427779 + ... + 454922.

It is an arithmetic number, because the mean of its divisors is an integer number (468567645).

Almost surely, 2^11980017972 is an apocalyptic number.

11980017972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11980017972 is an abundant number, since it is smaller than the sum of its proper divisors (21756852468).

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

11980017972 is a wasteful number, since it uses less digits than its factorization.

11980017972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882753 (or 882748 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 45.

The spelling of 11980017972 in words is "eleven billion, nine hundred eighty million, seventeen thousand, nine hundred seventy-two".