126513752513 has 8 divisors (see below), whose sum is σ = 129478750368. Its totient is φ = 123549791904.

The previous prime is 126513752509. The next prime is 126513752549. The reversal of 126513752513 is 315257315621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126513752513 - 2² = 126513752509 is a prime.

It is a super-2 number, since 2×126513752513² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126513752593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9731 + ... + 503112.

It is an arithmetic number, because the mean of its divisors is an integer number (16184843796).

Almost surely, 2^126513752513 is an apocalyptic number.

It is an amenable number.

126513752513 is a deficient number, since it is larger than the sum of its proper divisors (2964997855).

126513752513 is an equidigital number, since it uses as much as digits as its factorization.

126513752513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518623.

The product of its digits is 189000, while the sum is 41.

The spelling of 126513752513 in words is "one hundred twenty-six billion, five hundred thirteen million, seven hundred fifty-two thousand, five hundred thirteen".