126054610415521 has 4 divisors (see below), whose sum is σ = 126055018195200. Its totient is φ = 126054202635844.

The previous prime is 126054610415519. The next prime is 126054610415533. The reversal of 126054610415521 is 125514016450621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126054610415521 - 2¹ = 126054610415519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126054610415021) 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, 203425801 + ... + 204044518.

It is an arithmetic number, because the mean of its divisors is an integer number (31513754548800).

Almost surely, 2^{126054610415521} is an apocalyptic number.

It is an amenable number.

126054610415521 is a deficient number, since it is larger than the sum of its proper divisors (407779679).

126054610415521 is an equidigital number, since it uses as much as digits as its factorization.

126054610415521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407779678.

The product of its (nonzero) digits is 288000, while the sum is 43.

The spelling of 126054610415521 in words is "one hundred twenty-six trillion, fifty-four billion, six hundred ten million, four hundred fifteen thousand, five hundred twenty-one".