126572516551 has 4 divisors (see below), whose sum is σ = 136308863992. Its totient is φ = 116836169112.

The previous prime is 126572516537. The next prime is 126572516563. The reversal of 126572516551 is 155615275621.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 126572516551 - 2⁵ = 126572516519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126572516531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4868173701 + ... + 4868173726.

It is an arithmetic number, because the mean of its divisors is an integer number (34077215998).

Almost surely, 2^126572516551 is an apocalyptic number.

126572516551 is a deficient number, since it is larger than the sum of its proper divisors (9736347441).

126572516551 is an equidigital number, since it uses as much as digits as its factorization.

126572516551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9736347440.

The product of its digits is 630000, while the sum is 46.

The spelling of 126572516551 in words is "one hundred twenty-six billion, five hundred seventy-two million, five hundred sixteen thousand, five hundred fifty-one".