125784684020 has 24 divisors (see below), whose sum is σ = 279685945224. Its totient is φ = 47354233856.

The previous prime is 125784684019. The next prime is 125784684049. The reversal of 125784684020 is 20486487521.

It can be written as a sum of positive squares in 4 ways, for example, as 37232017936 + 88552666084 = 192956^2 + 297578^2 .

It is a super-2 number, since 2×125784684020² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184977137 + ... + 184977816.

It is an arithmetic number, because the mean of its divisors is an integer number (11653581051).

Almost surely, 2^125784684020 is an apocalyptic number.

125784684020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125784684020 is an abundant number, since it is smaller than the sum of its proper divisors (153901261204).

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

125784684020 is a wasteful number, since it uses less digits than its factorization.

125784684020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369954979 (or 369954977 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 47.

The spelling of 125784684020 in words is "one hundred twenty-five billion, seven hundred eighty-four million, six hundred eighty-four thousand, twenty".