126252513909 has 12 divisors (see below), whose sum is σ = 188247476352. Its totient is φ = 81453234600.

The previous prime is 126252513901. The next prime is 126252513911. The reversal of 126252513909 is 909315252621.

126252513909 is a `hidden beast` number, since 1 + 2 + 6 + 2 + 5 + 251 + 390 + 9 = 666.

It is not a de Polignac number, because 126252513909 - 2³ = 126252513901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126252513901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226258707 + ... + 226259264.

It is an arithmetic number, because the mean of its divisors is an integer number (15687289696).

Almost surely, 2^126252513909 is an apocalyptic number.

It is an amenable number.

126252513909 is a deficient number, since it is larger than the sum of its proper divisors (61994962443).

126252513909 is a wasteful number, since it uses less digits than its factorization.

126252513909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452518008 (or 452518005 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The spelling of 126252513909 in words is "one hundred twenty-six billion, two hundred fifty-two million, five hundred thirteen thousand, nine hundred nine".