187400676821780 has 48 divisors (see below), whose sum is σ = 403662580139280. Its totient is φ = 73054978790400.

The previous prime is 187400676821779. The next prime is 187400676821837. The reversal of 187400676821780 is 87128676004781.

It can be written as a sum of positive squares in 8 ways, for example, as 22276172215696 + 165124504606084 = 4719764^2 + 12850078^2 .

It is a super-2 number, since 2×187400676821780² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 704486801 + ... + 704752760.

It is an arithmetic number, because the mean of its divisors is an integer number (8409637086235).

Almost surely, 2^{187400676821780} is an apocalyptic number.

187400676821780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

187400676821780 is an abundant number, since it is smaller than the sum of its proper divisors (216261903317500).

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

187400676821780 is a wasteful number, since it uses less digits than its factorization.

187400676821780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409239740 (or 1409239738 counting only the distinct ones).

The product of its (nonzero) digits is 50577408, while the sum is 65.

The spelling of 187400676821780 in words is "one hundred eighty-seven trillion, four hundred billion, six hundred seventy-six million, eight hundred twenty-one thousand, seven hundred eighty".