125809252415 has 32 divisors (see below), whose sum is σ = 188256614400. Its totient is φ = 78412838400.

The previous prime is 125809252357. The next prime is 125809252417. The reversal of 125809252415 is 514252908521.

It is a Cunningham number, because it is equal to 354696²-1.

It is not a de Polignac number, because 125809252415 - 2⁸ = 125809252159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125809252417) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2457530 + ... + 2508200.

It is an arithmetic number, because the mean of its divisors is an integer number (5883019200).

Almost surely, 2^125809252415 is an apocalyptic number.

125809252415 is a deficient number, since it is larger than the sum of its proper divisors (62447361985).

125809252415 is a wasteful number, since it uses less digits than its factorization.

125809252415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57143.

The product of its (nonzero) digits is 288000, while the sum is 44.

The spelling of 125809252415 in words is "one hundred twenty-five billion, eight hundred nine million, two hundred fifty-two thousand, four hundred fifteen".