125691603784 has 64 divisors (see below), whose sum is σ = 258934579200. Its totient is φ = 56940902400.

The previous prime is 125691603749. The next prime is 125691603787. The reversal of 125691603784 is 487306196521.

It is not an unprimeable number, because it can be changed into a prime (125691603787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 727212 + ... + 883300.

It is an arithmetic number, because the mean of its divisors is an integer number (4045852800).

It is a 1-persistent number, because it is pandigital, but 2⋅125691603784 = 251383207568 is not.

Almost surely, 2^125691603784 is an apocalyptic number.

It is an amenable number.

125691603784 is an abundant number, since it is smaller than the sum of its proper divisors (133242975416).

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

125691603784 is a wasteful number, since it uses less digits than its factorization.

125691603784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156334 (or 156330 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 125691603784 in words is "one hundred twenty-five billion, six hundred ninety-one million, six hundred three thousand, seven hundred eighty-four".