1872451688128 has 112 divisors (see below), whose sum is σ = 4360050858240. Its totient is φ = 781139487744.

The previous prime is 1872451688123. The next prime is 1872451688141. The reversal of 1872451688128 is 8218861542781.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×1872451688128² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1872451688123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5478483 + ... + 5810221.

It is an arithmetic number, because the mean of its divisors is an integer number (38929025520).

Almost surely, 2^{1872451688128} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1872451688128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2180025429120).

1872451688128 is an abundant number, since it is smaller than the sum of its proper divisors (2487599170112).

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

1872451688128 is a wasteful number, since it uses less digits than its factorization.

1872451688128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332094 (or 332084 counting only the distinct ones).

The product of its digits is 13762560, while the sum is 61.

The spelling of 1872451688128 in words is "one trillion, eight hundred seventy-two billion, four hundred fifty-one million, six hundred eighty-eight thousand, one hundred twenty-eight".