125509793994 has 96 divisors (see below), whose sum is σ = 296127184080. Its totient is φ = 38187749376.

The previous prime is 125509793977. The next prime is 125509794001. The reversal of 125509793994 is 499397905521.

125509793994 is a `hidden beast` number, since 1 + 2 + 5 + 509 + 7 + 9 + 39 + 94 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 33935166225 + 91574627769 = 184215^2 + 302613^2 .

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51500544 + ... + 51502980.

Almost surely, 2^125509793994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125509793994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148063592040).

125509793994 is an abundant number, since it is smaller than the sum of its proper divisors (170617390086).

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

125509793994 is a wasteful number, since it uses less digits than its factorization.

125509793994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4824 (or 4821 counting only the distinct ones).

The product of its (nonzero) digits is 27556200, while the sum is 63.

The spelling of 125509793994 in words is "one hundred twenty-five billion, five hundred nine million, seven hundred ninety-three thousand, nine hundred ninety-four".