126400251515 has 16 divisors (see below), whose sum is σ = 153340318560. Its totient is φ = 100016778240.

The previous prime is 126400251503. The next prime is 126400251529. The reversal of 126400251515 is 515152004621.

It is not a de Polignac number, because 126400251515 - 2⁴ = 126400251499 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108107 + ... + 514283.

It is an arithmetic number, because the mean of its divisors is an integer number (9583769910).

Almost surely, 2^126400251515 is an apocalyptic number.

126400251515 is a deficient number, since it is larger than the sum of its proper divisors (26940067045).

126400251515 is a wasteful number, since it uses less digits than its factorization.

126400251515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406862.

The product of its (nonzero) digits is 12000, while the sum is 32.

The spelling of 126400251515 in words is "one hundred twenty-six billion, four hundred million, two hundred fifty-one thousand, five hundred fifteen".